Apply is a verb with multiple meanings in English:
1. To make a formal request, usually in writing, for something such as a job, admission to a school, or a loan.
2. To put or spread something such as paint, cream, or medicine on a surface.
3. To be relevant or appropriate to a particular person or situation.
4. To bring or put into operation or use.
5. To work hard at something; to apply oneself.