use, employ, utilize mean to put into service especially to attain an end. use implies availing oneself of something as a means or instrument to an end.

Your table manners are appalling - don't you know how to use a knife and fork? Please use the side entrance. If we clear out the spare room, you can use it as a study. The teacher …

The words employ and utilize are common synonyms of use. While all three words mean "to put into service especially to attain an end," use implies availing oneself of something as a means …

If you have a use for something, you need it or can find something to do with it.

As a noun use means "purpose." As a verb, use means either "put to work," or "work something until there isn't anything left," unless you use your friend, meaning you exploit her.

She quickly used up (all of) her inheritance. Don't shower too long and use up (all) the hot water.

There are 70 meanings listed in OED's entry for the verb use, 18 of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Guests have free use of the hotel swimming pool. Turn the machine off when it's not in use (= being used).

Use definition: to employ for some purpose; put into service; make use of.. See examples of USE used in a sentence.

"the use of energy has increased steadily "; "The use of goods and services increased during the holiday season "; - consumption, economic consumption, usance [archaic], use of goods and …