How to say apply ?

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What is the definition of apply ?

1. refer (a word or name) to a person or thing
2. ask (for something)
3. apply oneself to
4. put into service; make work or employ for a particular purpose or for its inherent or natural purpose
5. ensure observance of laws and rules
6. give or convey physically
7. apply to a surface
8. be applicable to; as to an analysis
9. avail oneself to
10. be pertinent or relevant or applicable