The understanding or assumption of a person's mental state by the observation of their behaviour

A nervous breakdown.

plural of mentch

(idiomatic) What you just said reminds me of something; Used to justify a change of subject or a kind of statement that needs some kind of license.

One's emotional well-being, especially with reference to one's outlook on life, ability to cope with stress or the absence of a mental disorder.

(anatomy) A paired central muscle of the lower lip, situated at the tip of the chin; it originates in the incisive fossa of the mandible, inserts in the skin of the chin, and raises the chin and pushes up the lower lip.

(philosophy) Of or pertaining to mentalism.

(psychology) The ability to understand mental states that underlies the overt behaviour of oneself or others.

(dated) mental hospital

plural of mental disorder