Adjective
1. involving the mind or an intellectual process;
"mental images of happy times""mental calculations""in a terrible mental state""mental suffering""free from mental defects"2. of or relating to the mind;
"mental powers""mental development""mental hygiene"3. of or relating to the chin- or lip-like structure in insects and certain mollusks
4. of or relating to the chin or median part of the lower jaw
5. affected by a disorder of the mind;
"a mental patient""mental illness"