(idiomatic) To keep quiet; to keep a secret; to not tell.

Saying too much or releasing confidential information can have dangerous consequences.

(dieting) Indulgence in food and drink gives a brief period of sensory pleasure but tends to increase one's body weight in the long term.

simple past tense and past participle of keep one's lips sealed

present participle of keep one's lips sealed

Third-person singular simple present indicative form of keep one's lips sealed

(informal) Used to express the speaker's wish that a preceding statement by another speaker were to come true.

(informal, often imperative, idiomatic) To refrain from or to stop talking; to be quiet; shut up.

a kind of snail, Cepaea hortensis, very similar to the grove snail, but with a white band at the lip of the shell.

(idiomatic) The quality of being resolute and showing self-restraint, stereotypically associated with the British; especially as keep a stiff upper lip.