Definition of "mental" in English

adjective

1. (relational) Of or relating to the mind or specifically the total emotional and intellectual response of an individual to external reality.

2. Of, relating to, or affected by a psychiatric disorder.

   • a mental patient

3. (colloquial, UK, Ireland, Australia, New Zealand, comparable) Enjoyable or fun, especially in a frenetic way.

   • That was a mental party last night.

4. Of or relating to telepathic or mind-reading powers.

   • mental telepathy

noun

1. (slang) State of mind; ellipsis of mental state.

   • y'all need to fix your mentals

2. (India, offensive) A mentally challenged person.

adjective

1. (anatomy, relational) Of or relating to the chin or median part of the lower jaw, genial.

   • the mental nerve, the mental region

2. (biology, relational) Of or relating to the chinlike or liplike structure.

noun

1. (zootomy) A plate or scale covering the mentum or chin of a fish or reptile.