Definition of “application” - Learner’s Dictionary

application

noun uk us /ˌæplɪˈkeɪʃən/
REQUEST [ C ]

B1 an official request for something, usually in writing:

an application for a bank loan
USE [ C, U ]

a way in which something can be used for a particular purpose:

This technology has many practical applications.
COMPUTER PROGRAM [ C ]

B2 a computer program designed for a particular purpose:

internet/web/Windows™ application

(Definition of “application” from the Cambridge Learner's Dictionary © Cambridge University Press)