(military) To move oneself or one's vehicle(s) (warships, tanks, aircraft, etc.) closer to the enemy in order to allow them to fire on the enemy, either more effectively or at all.

simple past tense and past participle of number close

(Scotland, informal, archaic) Synonym of up a tree (“in a difficult situation”)

present participle of close one's eyes and think of England

A system of television cameras, connected by cable to a control room, used for surveillance.

(colloquial) To stop what one is doing, especially in the context of a business.

(idiomatic) In private; in one's private life; lacking (normal) public disclosure, in camera. / (idiomatic, sports) Without public spectators.

(finance) A collective investment scheme with a limited number of shares.

(idiomatic) to pay careful attention to a situation or a thing, so that you can deal with any changes or problems.

Used other than figuratively or idiomatically: see close, one's, eyes. / (idiomatic) To ignore something. / (idiomatic) To sleep.