USE

noun

1. The act of using.
2. The act of consuming alcohol or narcotics.
3. (followed by "of") Usefulness, benefit.

verb

1. To utilize or employ.
2. To accustom; to habituate. (Now common only in participial form. Uses the same pronunciation as the noun; see usage notes.)
3. (except in past tense) To habitually do; to be wont to do. (Now chiefly in past-tense forms; see used to.)