a formal (often written) request for something, such as a job, permission to do something or a place at a college or university

the practical use of something, especially a theory, discovery, etc.

The invention would have a wide range of applications in industry.

What are the practical applications of this work?

the application of new technology to teaching

an act of putting or spreading something, such as paint or medical creams, onto something else

It took three applications of paint to cover the graffiti.

lotion for external application only

the act of making a rule, etc. operate or become effective

a program designed to do a particular job; a piece of software

the strength of mind to work hard at something; great effort

Success as a writer demands great application.

LEARNit Dictionary