use
noun
Definitions
The act of using.
Example: The use of torture has been condemned by the United Nations.
The act of consuming alcohol or narcotics.
(followed by "of") Usefulness, benefit.
Example: What's the use of a law that nobody follows?
A function; a purpose for which something may be employed.
Example: This tool has many uses.
verb
Definitions
To utilize or employ.
To accustom; to habituate. (Now common only in participial form. Uses the same pronunciation as the noun; see usage notes.)
Example: soldiers who are used to hardships and danger
(except in past tense) To habitually do; to be wont to do. (Now chiefly in past-tense forms; see used to.)
Example: I used to get things done.
To behave toward; to act with regard to; to treat.
Example: to use an animal cruelly