plural of U

(euphemistic) To use the restroom. / (euphemistic) To defecate or urinate, regardless of whether one is in a restroom.

Currently being used. / (archaic) Used; accustomed.

(colloquial, usually with a following present participle or infinitive expression) Used to indicate that the specified action cannot succeed or offers no advantage if successful

(colloquial, usually with a following present participle or infinitive expression) Used to indicate that the specified action cannot succeed or offers no advantage if successful

Worn out; depleted; exhausted; having nothing left; useless, due to the expenditure of all resources.

simple past tense and past participle of use up

(philately) Of a postage stamp, cancelled in the normal course of postal business, rather than to devalue it for sale to collectors.

Frequently used.

plural of used bookstore