Meaning of “close” - Learner’s Dictionary

close

verb [ I, T ] uk us /kləʊz/
DOOR/WINDOW ETC

A1 If something closes, it moves so that it is not open, and if you close something, you make it move so that it is not open:

Jane closed the window.
Lie down and close your eyes.
Suddenly the door closed.
PUBLIC PLACE

A2 If a shop, restaurant, public place, etc closes, people cannot go in it:

The store closes at 8 p.m.
ORGANIZATION (also close down)

B2 If a business or organization closes, or if someone or something closes it, it stops operating:

Many factories have closed in the last ten years.
END

B2 to end, or to end something:

She closed the meeting with a short speech.
COMPUTER

If a computer program or a window on a computer screen closes, or if you close it, it stops operating because you tell it to:

This file won't close.

(Definition of “close verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)