Ap (adjective)
abbreviation of apothecaries’ system
“ap oz (apothecaries’ ounce)”
App (noun)
An application (program), especially a small one designed for a mobile device.
App (noun)
application use, purpose; not a computer program
App (noun)
appetizer
App (noun)
an appearance in a game (e.g., a player with 10 apps in a season played 10 times)
Wiktionary
App (noun)
an application, especially as downloaded by a user to a mobile device
“I’ve just installed the app on my phone”
App (noun)
an application or application form
“Ezra’s helping her with her college apps”
“don’t waste your time filling out online job apps”
App (noun)
an appetizer
“I will be making these eggs as one of my apps for my Mother’s Day dinner”
“have you tried the fennel salad app?”
Oxford Dictionary