Meaning of “quiet” - Learner’s Dictionary

quiet

adjective uk us /kwaɪət/
NOT NOISY

A2 making little or no noise:

Can you be quiet, please?
The children are very quiet.
NOT BUSY

A2 without much noise or activity:

I fancy a quiet night in tonight.
They found a table in a quiet corner of the restaurant.
NOT TALKING MUCH

B1 If someone is quiet, they do not talk very much:

He was a shy, quiet man.
keep (sth) quiet

to not talk about something that is secret:

It might be wise to keep this quiet for a while.

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