drop-off
1 of 2noun
ˈdräp-ˌȯf 
1
: a very steep or perpendicular descent
2
: a marked dwindling or decline
a drop-off in attendance
3
: the act or an instance of making a usually brief deposit or delivery
drop-off points along the route
drop off
2 of 2verb
ˌdräp-ˈȯf
dropped off; dropping off; drops off
intransitive verb
: to fall asleep
Synonyms
Noun
- abatement
- decline
- decrease
- decrement
- dent
- depletion
- depression
- diminishment
- diminution
- drop
- fall
- falloff
- loss
- reduction
- shrinkage
- step-down
See all Synonyms & Antonyms 
Example Sentences
Verb my interest in photography has dropped off over the years
Word History
First Known Use
Noun
1923, in the meaning defined at sense 1
Verb
1812, in the meaning defined above