app

/æp/ noun [C]

Definition

› IT abbreviation for application or application program: a computer program that is designed for a particular purpose: After plugging the unit into your wired network, you run a little app on your PC that searches the network to locate the camera. → See also killer app

› IT, COMMUNICATIONS abbreviation for application or application program: a small computer program that you can download onto a mobile phone: There are apps for everything, from learning Swedish to booking cinema tickets.

(Definition of app noun from the Cambridge Business English Dictionary © Cambridge University Press)