. the act of applying to a particular purpose or use
2. relevance or value: the practical applications of space technology.
3. the act of asking for something: an application for leave.
4. a verbal or written request, as for a job, etc: he filed his application.
5. diligent effort or concentration: a job requiring application.
6. (Medicine) something, such as a healing agent or lotion, that is applied, esp to the skin
7. (Logic) logic maths the process of determining the value of a function for a given argument
8. (Mathematics) logic maths the process of determining the value of a function for a given argument
9. (Computer Science) short for application program, applications package