Application has the following meanings:

• In general, an application is using something abstract for a more concrete use. For example: applied science.
• In business, an application is call for a job.
• In computing, "application" refers to a software application.
• Applications software (also called end-user programs) includes database programs, word processors, and spreadsheets. Figuratively speaking, applications software sits on top of systems software because it is unable to run without the operating system and system utilities.

See also: application server