n A surname from German.
n (computing, mobile telephony) An application (program), especially a small one designed for a mobile device.
n (military) application (use, purpose; not a computer program)
n (education, informal) application (to a college etc.)
n (informal) appetizer
n (sports) an appearance in a game (e.g., a player with 10 apps in a season played 10 times)
n Abbreviation of appeals.
n (nonstandard, common in China) Alternative form of app [(computing, mobile telephony) An application (program), especially a small one designed for a mobile device.]
n (countable, biochemistry, immunology) Initialism of acute-phase protein. [(biochemistry, immunology) Any of a class of proteins whose plasma concentrations change in response to inflammation, such as C-reactive protein.]
n (countable, biochemistry, medicine) Initialism of amyloid precursor protein.
n (uncountable) Initialism of ammonium polyphosphate.
n (finance) Initialism of authorized push payment.