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单词 decrease
释义
decrease1 verbdecrease2 noun
decreasede‧crease1 /dɪˈkriːs/ ●●○ verb [intransitive, transitive] Word Origin
WORD ORIGINdecrease1
Origin:
1300-1400 Anglo-French decreistre, from Latin decrescere, from crescere ‘to grow’
Verb Table
VERB TABLE
decrease
Simple Form
PresentI, you, we, theydecrease
he, she, itdecreases
PastI, you, he, she, it, we, theydecreased
Present perfectI, you, we, theyhave decreased
he, she, ithas decreased
Past perfectI, you, he, she, it, we, theyhad decreased
FutureI, you, he, she, it, we, theywill decrease
Future perfectI, you, he, she, it, we, theywill have decreased
Continuous Form
PresentIam decreasing
he, she, itis decreasing
you, we, theyare decreasing
PastI, he, she, itwas decreasing
you, we, theywere decreasing
Present perfectI, you, we, theyhave been decreasing
he, she, ithas been decreasing
Past perfectI, you, he, she, it, we, theyhad been decreasing
FutureI, you, he, she, it, we, theywill be decreasing
Future perfectI, you, he, she, it, we, theywill have been decreasing
Examples
EXAMPLES FROM OTHER DICTIONARIES
  • Better health education should help to decrease the incidence of heart disease.
  • Birth control pills decrease the chances of getting pregnant.
  • Experts say that the time parents spend with their children is decreasing.
  • Sales in Japan decreased last quarter.
  • The speed of rotation gradually decreases to zero.
  • Use of the new nets has significantly decreased the number of dolphins killed accidentally each year.
  • Various methods are being explored in order to decrease the volume of traffic on our roads.
EXAMPLES FROM THE CORPUS
  • Histamine secretion was decreased about sixfold in all groups at day 7 compared with day 3.
  • Other complications of pregnancy were found to decrease almost linearly with age of women.
  • Supplementary dietary phosphate decreased the fatty acid concentration only on the low calcium diet.
  • Texaco had lifted capital spending 11 % last year, after decreasing it in 1993 and 1994.
  • The second possibility is for supply to decrease and demand to increase.
  • Their use decreased slightly in September, to 149 reported instances.
  • They also delay sleep onset, increase the chances of waking after sleep onset occurs, and decrease total sleep time.
  • This will increase rather than decrease pollution.
Thesaurus
THESAURUS
to become less in number or amount: · The average rainfall has decreased by around 30 percent.
to decrease. Go down is less formal than decrease and is the usual word to use in conversation: · Unemployment has gone down in the past few months.
formal to decrease – used with numbers or amounts, or about the level or standard of something: · The standard of living has declined.· Support for the government is steadily declining.· Salaries have declined by around 4.5%.
to become smaller or less important: · Union membership diminished from 30,000 at its height to just 2,000 today.
to decrease, especially by a large amount. Fall and drop are less formal than decrease: · The number of tigers in the wild has fallen to just over 10,000.· At night, the temperature drops to minus 20 degrees.
to suddenly decrease very quickly and by a very large amount: · Share prices have plummeted 29% in the last four months.· Climate change could cause global temperatures to plummet.
if a price or value slides, it gradually decreases in a way that causes problems – used especially in news reports: · The dollar fell in late trading in New York yesterday and slid further this morning.
to gradually decrease until there is very little left of something, especially numbers or amounts, popularity, or importance: · Support for the theory is dwindling.
if a number or the amount of an activity that is happening tapers off, it gradually decreases, especially so that it stops completely: · Political violence tapered off after the elections.
Longman Language Activatorwhen prices, numbers etc become less
to become less: · Attendance at the school's basketball games has gone down significantly in the last few years.· I'm hoping the price will come down if I wait a while.
to become less, especially by a large amount: · Sales have fallen dramatically in Houston and Toronto.fall/drop to: · At night, the temperature drops to -20°C.fall/drop from something to something: · Profits fell from £98.5 million to £76 million.
to become less - used especially in writing about business or technical subjects: · Experts say that the time parents spend with their children is decreasing.decrease to: · The speed of rotation gradually decreases to zero.
a gradual decrease in the number or amount of something good or important so that the situation becomes worse: · Firms with large debts may not have the financial strength to survive a prolonged sales decline or a recession.decline in: · We can expect a further decline in job vacancies.
when a price, level etc is reduced - use this when something is reduced deliberately: · New production methods led to a cost reduction of about 50 percent.reduction in: · Cleaner fuel has contributed to a reduction in air pollution.· a reduction in working hours
a reduction in the amount or size of something made by a government or large organization - use this especially when talking about politics or business: cut in: · Cuts in the education budget have led to fewer teachers and larger classes.pay/job/tax cuts (=cuts in wages, number of jobs, or taxes): · The whole team agreed to take pay cuts, rather than see their colleagues lose their jobs.· Some senators have called for huge tax cuts to stimulate the economy.
to drop very rapidly and by a large amount: · As soon as the sun went down, the temperature plummeted.· The drought has caused the price of hay to soar, and the price of cattle has plummeted.plummet/plunge 20 degrees/thirty points etc: · The stock market plunged 30 points when the news was announced.
if a number or the amount of activity happening tapers off , it gradually decreases: · Towards sunset, the rain began to taper off.
if supplies or numbers of something dwindle , they gradually decrease: · The country's foreign currency reserves have dwindled over the past few years.dwindle to: · The original platoon of 30 men had dwindled to 12.
if a price or value slides it gradually decreases in a way that causes problems - used especially in news reports: · Prices will continue to slide unless production is reduced.· The dollar fell in late trading in New York yesterday and slid further this morning.
also nosedive informal if the price or value of something takes a nosedive , it becomes lower very quickly and causes problems. If an economy takes a nosedive it become worse very quickly: · Since January, sales of cars and trucks, including minivans, have nosedived.· Shares on the stock exchange took another nosedive Friday.
to reduce the number, amount, price, or size of something
to make something less in amount or level: · I was hoping they would reduce the price a little.greatly/significantly/dramatically reduce: · You can greatly reduce your heating bills by using low-energy heaters.dramatically/drastically reduce: · Their income has been drastically reduced.reduce something by half/10%/2 years etc: · The new road will reduce traffic through the town by 30%.· Benefits will be reduced by $50 for each child who fails to attend school.
to reduce an amount, limit, or level - use this especially in writing about business or technical subjects: · After 20 minutes, lower the temperature to 200 degrees.· The Bundesbank is under pressure to lower interest rates.
to reduce something by a lot, especially prices, time, or money: · The new system is aimed at cutting the average waiting time.cut something by half/several weeks/ten per cent etc: · Because of the recession, salaries in the advertising industry have been cut by a half.· The mortgage insurance agency has cut costs by $2000 over the last 3 years, making it easier for people to buy homes.cut something from/to something: · His annual leave has been cut from six weeks to just three.
to reduce the level of sound, heat, light etc, especially by turning a control: turn something down: · Could you turn the lights down - it's too bright in here.turn down something: · The weather wasn't as cold, so we decided to turn down the central heating.turn something down slightly/a little/a bit: · Would you mind turning the volume down a little?
to reduce something, especially by a fairly small amount or number: · Various methods are being explored in order to decrease the volume of traffic on our roads.· Better health education should help to decrease the incidence of heart disease.· Use of the new nets has significantly decreased the number of dolphins killed accidentally each year.
informal to reduce prices by a very large amount - used especially in advertisements and newspapers: · American car manufacturers have started slashing prices in an effort to stimulate sales.· Public spending has been slashed over the past two years.slash something by 10%/half/75% etc: · Come to our Summer Sale, where prices have been slashed by up to 75%.
informal to reduce the price of something by a large amount, especially in order to make it easier to sell: knock down something: · Shops are knocking down prices in an effort to increase sales.knock something down: · In the end he knocked the price down to £70.
to reduce something by half: · The overseas aid budget has been almost halved, from $18m to just over $10m.
American to reduce prices: roll back something: · Most of the big downtown stores have rolled back their prices to dispose of winter stock.roll something back: · Rather than roll prices back, the company negotiated pay increases that ranged between 10 and 15 percent.
Collocations
COLLOCATIONS FROM THE ENTRYadverbs
(=enough to be an important change)· Violent crime has significantly decreased over the last ten years.
(=a lot)· During this period unemployment decreased considerably.
(=very noticeably)· Aircraft collisions decreased markedly during the 1990s.
(=very quickly)· Since then, elephant numbers have been decreasing rapidly.
(=suddenly and a lot)· The survival rate decreases dramatically as the disease progresses.
(=a little)· Population levels actually began to slightly decrease five years ago.
(=gradually and continuously)· The proportion of adult cigarette smokers has been steadily decreasing.
COLLOCATIONS FROM OTHER ENTRIES
· Coal consumption has fallen dramatically.
(=become 50% less)· Share prices fell by half.
· Pollution levels have fallen slightly.
· The number of new houses being built is falling steadily.
· The population in many rural areas has continued to fall.
· In real terms, the price of clothes has fallen over the last ten years.
COLLOCATIONS FROM THE CORPUSADVERB
· The strength of cast iron also decreases less rapidly with temperature.· Of course, the required centripetal force also decreases as we make the radius of the circle bigger.· We have also shown for the first time such treatment also decreases basal gastric acid secretion significantly.
· The laxative dose was gradually decreased after two to three months to a dose that maintained one bowel movement daily.· Some patients experience a slow decline in their health as the effectiveness of the drugs gradually decreases.· Under such circumstances the frequency with which you visited the pub would be likely to decrease gradually over time.· The sum needed to cover the gap would gradually decrease each year as proceeds from parental trust funds phase into the system.· In the other group, they gradually decreased the lighting level one foot candle at the time.
· Other key findings include: Rice yields are likely to decrease significantly.· After preoperative radiotherapy the percentage of aneuploid tumours decreased significantly, from 71% to 47%.· Discussion Our current results confirm that treatment which both heals duodenal ulcers and eradicates H pylori significantly decreases basal plasma gastrin concentrations.· In the present study tissue type plasminogen activator activity in columnar carcinomas of the stomach, however, was significantly decreased.
· Blacks, in steadily decreasing numbers, continued to serve in the Legislature for the next 20 years.
NOUN
· This lack of oxygen decreases the activity of micro-organisms which break down detergents.· If time of incubation is cut, decreased activity will be seen.· Both schizophrenia and mood disorders show evidence of decreased activity in frontal lobes and abnormal function of the system for directed attention.· The binding of the enzyme-labeled drug to the antibody causes a steric alteration that results in decreased enzyme activity.· The increased cholinergic and decreased dopaminergic activity in the striatum is thought to be a cause of the parkinsonian state.
· If all goes well, our own production of cholesterol should decrease in relation to the amount we take in from outside.· Was that due to decreased amounts of cholesterol in the cancer cells?· You could exercise to increase the amount of lean muscle tissue and decrease the amount of fat in your body.· What happens when you decrease the amount of salt by adding more fresh water?· They say salting improves the texture and decreases the amount of oil absorbed during cooking.· You can solve that problem by increasing the number of stocks you invest in and decreasing the amount per stock.
· Because survival rates decrease dramatically as the disease progresses, early detection is key, Dressler says.
· Calculate a percentage of a sum of money. Increase or decrease a sum of money by a given percentage.· The total cost curve increases at a decreasing rate over some range and then begins to increase at an increasing rate.· Second, there is the issue of the increase or decrease in overtly exploitative, degrading and violent forms of sexuality.· The problem becomes more difficult for older adults as calcium needs increase while calorie needs decrease.· As the vehicle approaches, the pitch of its siren increases and then it decreases as the vehicle speeds past.· In iron deficiency anemia complicated by other disorders which either increase serum iron or decrease the.· There are positive and negative reinforcers which increase and decrease this rate of occurrence respectively.
· Wage levels have risen and the absorptive capacity of industry has decreased.· Of these six hormones, insulin is the only one that decreases the blood glucose level.· It decreases our levels of tolerance and resilience.· Moreover, few patients, if any, have their cholesterol decreased to very low levels with drug treatment.· Constant wetting makes nails soft and opaque, and chemical detergents and varnish removers decrease levels of moisture in the nail.· Short recordings of classical music caused their activity to decrease, sometimes to levels half of that before the music started.· In the other group, they gradually decreased the lighting level one foot candle at the time.· Production costs will decrease as the required level of stock is reduced.
· But the young fish still suffer and stocks are dwindling, so that fish-eating birds such as the reef egret are decreasing in numbers.· And a continuing -- although decreasing -- number hunt the wild animals that remain plentiful.· Blacks, in steadily decreasing numbers, continued to serve in the Legislature for the next 20 years.· By 1919 the number of soldiers began to decrease and the numbers of unemployed to increase.· The folds of fat decreased in number and size.
· But the young fish still suffer and stocks are dwindling, so that fish-eating birds such as the reef egret are decreasing in numbers.· Blacks, in steadily decreasing numbers, continued to serve in the Legislature for the next 20 years.· By 1919 the number of soldiers began to decrease and the numbers of unemployed to increase.
· Rainfall in the Sahel has decreased by around 30 percent.· Robberies were down 9. 4 percent, burglaries decreased 2. 4 percent.· Over the same period, pesticide use has decreased by 47 percent.· The percentage of poultry meat may decrease to 50 percent if statement is made of the percentage of broth. 6.· Over the same period the percentage derived from earnings has decreased from 27 percent to 9 percent.
· Accordingly, we tested the hypothesis that postoperative pain decreases subcutaneous oxygen partial pressure.· Then slowly decrease the finger pressure, ending with about twenty seconds of light touch.· As it passes through the device, the water decreases in pressure, sucking more water into pipes.· The remaining strategies are designed to decrease the overload and pressure themselves.· If the rise in unemployment has mercifully decreased, the pressure on wage restraints will have lessened.
· Pure alcohol injection after an epinephrine injection tended to decrease the rebleeding rate in our series.· The total cost curve increases at a decreasing rate over some range and then begins to increase at an increasing rate.· Some banks, such as the Woolwich, have even been stealthily decreasing rates on savings accounts.· However, the numbers are decreasing as the birth rate decreases generally.· The result is important since it decreases the rate of bladder filling during the night and allows us to sleep longer.· There are positive and negative reinforcers which increase and decrease this rate of occurrence respectively.
· More nuclear weapons, properly shared out, might decrease the risk of global war.· In addition, income security for a long period decreases the risks associated with the investment.
· Thus settling appeared to decrease the spread of sizes as estimated from sieving.· I think the president came into office committed, correctly, to decreasing the size of government.· The iris reacts quickly to changes in light levels, dilating or contracting, enlarging or decreasing the size of the pupil.· The folds of fat decreased in number and size.
· The treatment can decrease the time it takes the body to remove the lactic acid build-up in your muscles.· That finding suggests that hospitals trying to boost patient satisfaction must do more than merely decrease waiting times.· Under such circumstances the frequency with which you visited the pub would be likely to decrease gradually over time.· Contrary to mathematical expectation, the presence of Rupa and Dullah did not decrease the loading time by two thirds.· Internally the value of the rouble decreased seventy-two times with regard to goods during 1922.· They also delay sleep onset, increase the chances of waking after sleep onset occurs, and decrease total sleep time.· The aim is not to increase the community nurses' workload but rather to decrease time spent chasing the social work team.· Normally, some records are accessed more frequently than others, and this tendency can be used to decrease average access time.
VERB
· Pure alcohol injection after an epinephrine injection tended to decrease the rebleeding rate in our series.· Rising incomes may also tend to decrease demands for used clothing and third-hand automobiles.· If a development ceases, staff morale and confidence would tend to decrease.· Acidemia tends to decrease potassium excretion, and alkalemia tends to increase potassium excretion.· Average response speed tended to decrease over a period of twenty minutes in sleep-deprived subjects, unlike in rested controls.· Conversely, expectations of falling prices and income will tend to decrease the current demand for products.· Costs tend to decrease as expertise in accessing data develops.· Quarrelsomeness tended to decrease as children got older.
 to become less or go down to a lower level, or to make something do this → reduce OPP  increase:  The number of people who have the disease has decreased significantly in recent years. They want to decrease their reliance on oil.decrease by Average house prices decreased by 13% last year.decrease to By 1881, the population of Ireland had decreased to 5.2 million.decrease from The North’s share of the world’s energy consumption is expected to decrease from 70% to 60%.decrease in Attacks of asthma decrease in frequency through early adult life.GRAMMARDecrease belongs to a group of verbs where the same noun can be the subject of the verb or its object.• You can say: · They decreased the number of buses. In this sentence, ‘the number of buses’ is the object of decrease.• You can say: · The number of buses decreased. In this sentence, ‘the number of buses’ is the subject of decrease.Grammar guide ‒ VERBSCOLLOCATIONSadverbssignificantly (=enough to be an important change)· Violent crime has significantly decreased over the last ten years.considerably/substantially (=a lot)· During this period unemployment decreased considerably.markedly (=very noticeably)· Aircraft collisions decreased markedly during the 1990s.rapidly (=very quickly)· Since then, elephant numbers have been decreasing rapidly.dramatically (=suddenly and a lot)· The survival rate decreases dramatically as the disease progresses.slightly (=a little)· Population levels actually began to slightly decrease five years ago.steadily (=gradually and continuously)· The proportion of adult cigarette smokers has been steadily decreasing.THESAURUSdecrease to become less in number or amount: · The average rainfall has decreased by around 30 percent.go down to decrease. Go down is less formal than decrease and is the usual word to use in conversation: · Unemployment has gone down in the past few months.decline formal to decrease – used with numbers or amounts, or about the level or standard of something: · The standard of living has declined.· Support for the government is steadily declining.· Salaries have declined by around 4.5%.diminish to become smaller or less important: · Union membership diminished from 30,000 at its height to just 2,000 today.fall/drop to decrease, especially by a large amount. Fall and drop are less formal than decrease: · The number of tigers in the wild has fallen to just over 10,000.· At night, the temperature drops to minus 20 degrees.plunge /plʌndʒ//plummet /ˈplʌmət/ to suddenly decrease very quickly and by a very large amount: · Share prices have plummeted 29% in the last four months.· Climate change could cause global temperatures to plummet.slide if a price or value slides, it gradually decreases in a way that causes problems – used especially in news reports: · The dollar fell in late trading in New York yesterday and slid further this morning.dwindle /ˈdwɪndl/ to gradually decrease until there is very little left of something, especially numbers or amounts, popularity, or importance: · Support for the theory is dwindling.taper off /ˈteɪpə $ -ər/ if a number or the amount of an activity that is happening tapers off, it gradually decreases, especially so that it stops completely: · Political violence tapered off after the elections.
decrease1 verbdecrease2 noun
decreasede‧crease2 /ˈdiːkriːs/ ●●○ noun [countable, uncountable] Examples
EXAMPLES FROM OTHER DICTIONARIES
  • a 5 percent decrease in the value of the dollar
  • a significant decrease in the number of deaths from heart disease
  • In the last five years there has been a significant decrease in the number of deaths from heart disease.
EXAMPLES FROM THE CORPUS
  • Fewer consumers will be reflected by a decrease in demand.
  • It focused on the fact that none of the trials showed a decrease in mortality within seven years of follow-up.
  • It forecast a decrease of 5,000 for 1987-88; in fact, the decrease was 7,800.
  • Mechanization has not therefore necessarily involved any decrease in job satisfaction among farm workers.
  • The Schirmer and break up time test confirmed a decrease of tear secretion.
  • When resorption overtakes formation, the result is a decrease in bone density and strength.
Thesaurus
THESAURUS
used when the number, amount, or level of something becomes less than it used to be: · There has been a significant decrease in the number of deaths from lung cancer.· a 5% decrease in housing prices
used when the price, amount, or level of something is made lower: · There will be further price reductions in the sales.· A small reduction in costs can mean a large increase in profits.
used when a government or company reduces the price, amount, or level of something: · a 1% cut in interest rates· tax cuts· It is possible that there will be further job cuts.
used when the number, amount, or level of something goes down, especially by a large amount: · The figures showed a sharp fall in industrial output.· There was a dramatic drop in temperature.
used when the number, amount, level, or standard of something goes down, especially gradually: · During the 1970s, there was a gradual decline in the birthrate.· a decline in educational standards
Longman Language Activatora reduction in number, prices, levels etc
when a price, level etc is reduced - use this when something is reduced deliberately: · We offer a reduction for groups of 10 or more.reduction in: · Cleaner fuel has contributed to a reduction in air pollution.· a reduction in working hoursa reduction of £10/$5/5% etc (=a reduction by a particular amount): · There were reductions of up to 50% in some stores.a big/huge/massive reduction: · There has been a big reduction in the number of issues the president addresses in any given week.price reduction: · Several holiday firms are offering huge price reductions on winter holidays.
when something happens less than it used to: decrease in: · There has been a 15% decrease in violent crime (=it has gone down by 15%).a significant/marked decrease: · In the last five years there has been a significant decrease in the number of deaths from heart disease.
when a number or amount goes down suddenly or by a large amount: drop/fall in: · Charities have reported a 25% fall in donations during the past year.a sudden fall/drop: · Universities are reporting a sudden drop in the number of students studying science subjects.a sharp fall/drop: · This year we have seen a sharp fall in profits.
a reduction in the amount or size of something made by a government or large organization - use this especially for talking about politics or business: cut in: · Cuts in the education budget have led to fewer teachers and larger classes.a big/drastic cut: · There are to be big cuts in the health budget next year.pay/job/tax cuts (=cuts in wages, number of jobs, or taxes): · Nurses are protesting about further pay cuts.· The new management has promised that there will be no job cuts.
Collocations
COLLOCATIONS FROM OTHER ENTRIES
· Coal consumption has fallen dramatically.
(=become 50% less)· Share prices fell by half.
· Pollution levels have fallen slightly.
· The number of new houses being built is falling steadily.
· The population in many rural areas has continued to fall.
· In real terms, the price of clothes has fallen over the last ten years.
COLLOCATIONS FROM THE CORPUSADJECTIVE
· The largest percentage decrease in mortality during these three decades is shown by women aged 75 - 84.· The specialisms of geriatrics and orthopaedic surgery have recorded the largest decreases in average length of stay.
· In addition there have been significant decreases in fertility over the same period.· Access was already frustrated by an existing step and the additional minor increase in height made no real significant decrease in accessibility.· The acute response to nicotine in these chronically treated rats was a significant decrease in gastric secretion.· The patients not only showed an improved continence mechanism, but also reported a significant decrease in urgency.· Since 1951 there has been a significant decrease in the labour force participation of older male workers.· The addition of indomethacin resulted in a significant decrease in the radioactivity ratio between ulcerated and intact mucosa.
· Even a slight decrease, a sensible diet, will get you the results you want.
· Most economists expect a small decrease in mid-2001.· Further deletion to -90 and/ or -55 leads to a further small decrease in activity.
VERB
· This will cause a decrease in the current supply of corn.· Additionally, there will be an increased renal excretion of potassium causing a decrease of potassium in the extracellular fluid. 258.
· Whether leisure time increases or decreases as wage rates rise is an empirical question.· I pick behaviors that I want to increase or decrease.· If these pressures increase or decrease dramatically how will this affect the stability of the society?· That person's momentum has increased without any obvious decrease for another object.
· This would lead to a decrease, in the initial stages, of the production of the means of consumption.· This could result in the tissue ischaemia leading to the decrease in secretory activity of acinar cells.
· Changes in mortality rates will result in either a decrease or increase in prevalence according to the direction of change in mortality.· Oxygen is consumed during these processes resulting in a decrease in PO2 levels.
· When the orbital period is plotted as a function of time it shows a steady decrease:.· It focused on the fact that none of the trials showed a decrease in mortality within seven years of follow-up.· If your graphs and charts are showing an overall decrease in weight, then you know you are eating the right amounts.· The number of envelopes returned and the amount of cash donated both show a decrease on last year.· Figures show that beer sales by volume have actually shown a decrease.· The financial statement will be ready for the A.G.M. The donations from the general public show a decrease on previous years.· A computer printout running constantly shows any increase or decrease in activity and the appropriate fluctuation in energy output.· The profit and loss account shows the increase or decrease in the money held over the year.
 the process of becoming less, or the amount by which something becomes less OPP  increase SYN  reductiona decrease in something Teachers reported decreases in drug use and verbal abuse of teachers.a decrease of 50/5% etc There has been a decrease of 1 degree in average temperature.THESAURUSdecrease used when the number, amount, or level of something becomes less than it used to be: · There has been a significant decrease in the number of deaths from lung cancer.· a 5% decrease in housing pricesreduction used when the price, amount, or level of something is made lower: · There will be further price reductions in the sales.· A small reduction in costs can mean a large increase in profits.cut used when a government or company reduces the price, amount, or level of something: · a 1% cut in interest rates· tax cuts· It is possible that there will be further job cuts.drop/fall used when the number, amount, or level of something goes down, especially by a large amount: · The figures showed a sharp fall in industrial output.· There was a dramatic drop in temperature.decline used when the number, amount, level, or standard of something goes down, especially gradually: · During the 1970s, there was a gradual decline in the birthrate.· a decline in educational standards
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