Real Dictionary

use in American English
to put or bring into action or service; employ for or apply to a given purpose
intransitive verb: to be accustomed, wont, or customarily found (used with an infinitive expressed or understood, and, except in archaic use, now only in the past)
transitive verb: to employ for some purpose; put into service; make use of

use in British English
noun: the act of using or the state of being used
verb: to put into service or action; employ for a given purpose

use noun uses
If something has a particular use, it is intended for a particular purpose.
If you have the use of something, you have the permission or ability to use it.
Your use of something is the action or fact of your using it.
singular noun: If you have a use for something, you need it or can find something to do with it.

use verb uses
verb: If you use a supply of something, you finish it so that none of it is left.
verb: If you use something, you do something with it in order to do a job or to achieve a particular result or effect.