英语词汇“a”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	a
释义	a 1 of 13 noun ˈā plural a's or as ˈāz often capitalized, often attributive 1 a : the 1st letter of the English alphabet b : a graphic representation of this letter c : a speech counterpart of orthographic a 2 : the sixth tone of a C-major scale 3 : a graphic device for reproducing the letter a 4 : one designated a especially as the first in order or class 5 a : a grade rating a student's work as superior in quality b : one graded or rated with an A 6 : something shaped like the letter A 7 capitalized : the one of the four ABO blood groups characterized by the presence of antigens designated by the letter A and by the presence of antibodies against the antigens present in the B blood group a 2 of 13 indefinite article ə, for emphasis (ˈ)ā Canadian ˈa 1 —used as a function word before singular nouns when the referent is unspecified a man overboard and before number collectives and some numbers a dozen 2 : the same birds of a feather swords all of a length 3 a —used as a function word before a singular noun followed by a restrictive modifier a man who was here yesterday b : any a person who is sick can't work c —used as a function word before a mass noun to denote a particular type or instance a bronze made in ancient times d —used as a function word before a proper noun representing an example or type the attractions of a Boston or a Cleveland e —used as a function word before a proper noun to indicate limited knowledge about the referent a Mr. Smith called to inquire about the job f —used as a function word before a proper noun to distinguish the condition of the referent from a usual, former, or hypothetical condition a triumphant Ms. Jones greeted her supporters g —used before the name of a day of the week to refer to one occurrence of it Christmas falls on a Tuesday this year. h —used before the name of a person (such as a famous artist) when the name is being used to refer to something (such as a painting) created by that person Her violin is a Stradivarius. i —used before a family name to show that someone is a member of that family To be a Kennedy is to lead two lives …—Margaret Carlson 4 —used as a function word with nouns to form adverbial phrases of quantity, amount, or degree felt a bit tired A vs. an: Usage Guide In speech and writing a is used before a consonant sound. a door a human Before a vowel sound an is usual an icicle an honor but especially in speech a is used occasionally, more often in some dialects than in others. a apple a hour a obligation Before a consonant sound represented by a vowel letter a is usual a one a union but an also occurs though less frequently now than formerly. an unique such an one Before unstressed or weakly stressed syllables with initial h both a and an are used in writing. a historic an historic In the King James Version of the Old Testament and occasionally in writing and speech an is used before h in a stressed syllable. an huntress an hundred children are an heritage of the Lord —Psalms 127:3 (King James Version) a 3 of 13 preposition (1) ə, also (ˈ)ā 1 : in, to, or for each twice a week 2 chiefly dialectal : on, in, at a 4 of 13 preposition (2) ə informal : of There are a lot a stairs, but the view at the top is absolutely beautiful.—Auli'i Cravalho, quoted in The New York Times —often attached to the preceding word But I did kinda sorta secretly hope to one day be interviewed from Oprah Winfrey's yoga nook.—Jennifer SeniorThat's a whole lotta [=lot of] hypothesizin' without a whole lotta science.—Rebecca Watson a 5 of 13 verb ə, (ˌ)a archaic : have I might a had husbands afore now …—John Bunyan Poor Sir William! never shall I forget how he looked whin my lady and he parted. I could a tould the reason, but I'd a cut my tongue out first.—Anne Newport Royall a 6 of 13 abbreviation (1) 1 absent 2 acceleration 3 acre 4 adult 5 alto 6 chemistry amorphous —usually used in combination a-Si 7 anode 8 answer 9 ante 10 anterior 11 are 12 area 13 atto- 14 author a- 7 of 13 prefix (1) ə 1 : on : in : at abed 2 : in (such) a state or condition afire 3 : in (such) a manner aloud 4 : in the act or process of gone a-hunting atingle a- 8 of 13 prefix (2) (ˈ)ā, also (ˈ)a, or (ˈ)ä variants or an- (ˈ)an : not : without asexual —a- before consonants other than h and sometimes even before h, an- before vowels and usually before h achromaticahistoricalanastigmaticanhydrous -a- 9 of 13 combining form : replacing carbon especially in a ring aza- -a 10 of 13 noun suffix ə : oxide silica alumina magnesia A 11 of 13 abbreviation (2) 1 ace 2 adenine 3 ampere A 12 of 13 symbol argon Å 13 of 13 abbreviation (3) angstrom Example Sentences Noun a word that begins with an a a word that begins with a a song in the key of A She got an A on the exam. Word History Etymology Indefinite article Middle English, from Old English ān one — more at one Preposition (1) Middle English, from Old English a-, an, on Preposition (2) Middle English, by contraction Verb Middle English, contraction of have Prefix (1) Middle English, from Old English Prefix (2) Latin & Greek; Latin, from Greek — more at un- Combining form perhaps from -a- in ring compounds such as thiazole (in which -a- is the initial of azole) Noun suffix New Latin, from -a (as in magnesia) First Known Use Noun before the 12th century, in the meaning defined at sense 1a Indefinite Article before the 12th century, in the meaning defined at sense 1 Preposition (1) before the 12th century, in the meaning defined at sense 2 Preposition (2) 15th century, in the meaning defined above Verb 14th century, in the meaning defined above Kids Definition a 1 of 5 noun ˈā plural a's or as often capitalized 1 : the first letter of the English alphabet 2 : a musical note referred to by the letter A : the sixth tone of a C-major scale 3 : a grade rating a student's work as superior a 2 of 5 indefinite article ə (ˈ)ā 1 : someone or something unspecified a man in the street a dozen 2 : the same : one two of a kind birds of a feather 3 : of whatever kind : any a person who is sick can't work well —used in all senses before words beginning with a consonant sound compare an a 3 of 5 preposition ə (ˈ)ā : in each : to each : for each twice a week one a piece a- 4 of 5 prefix ə 1 : on : in : at abed 2 : in a specified state or condition afire 3 : in a specified manner aloud 4 : in the act or process of gone a-hunting a- 5 of 5 prefix (ˈ)ā variants or an- (ˈ)an : not : without asexual —a- before consonants other than h and sometimes before h, an- before vowels and usually before h anhydrate Medical Definition a 1 of 4 abbreviation 1 about 2 absent 3 absolute 4 absorbency; absorbent 5 accommodation 6 acetum 7 acid; acidity 8 actin 9 active; activity 10 allergist; allergy 11 alpha 12 anode 13 answer 14 ante 15 anterior 16 aqua 17 area 18 artery 19 asymmetric; asymmetry A 2 of 4 noun ˈā : the one of the four ABO blood groups characterized by the presence of antigens designated by the letter A and by the presence of antibodies against the antigens present in the B blood group A 3 of 4 abbreviation 1 adenine 2 ampere Å 4 of 4 symbol angstrom
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