mental /ˈmɛn.təl/adjective 13noun 3forms 3phrases 1 adjective13 •happening or felt inside the mind, and not in the body •Of or relating to the mind or specifically the total emotional and intellectual response of an individual to external reality. •Relating to the mind, its activity, or its products as an object of study. •Of, relating to, or being intellectual as contrasted with overt physical activity. •Relating to spirit or idea as opposed to matter.the distinction between physical things and mental ideas •Of, relating to, or affected by a psychiatric disorder. •Intended for the care or treatment of persons affected by psychiatric disorders. •(UK, informal) Mentally disordered; insane, mad, crazy.He is the most mental freshman I've seen yet.He went mental on us. •(UK, informal) Enjoyable or fun, especially in a frenetic way.That was a mental party last night. •Of or relating to intellectual as contrasted with emotional activity. •Of or relating to telepathic or mind-reading powers. •Of or relating to the chin or median part of the lower jaw, genial. •Of or relating to the chinlike or liplike structure. noun3 •(slang) State of mind; ellipsis of mental state. •(India, offensive) A mentally challenged person. •A plate or scale covering the mentum or chin of a fish or reptile. formsmentals · more mental · most mental Phrases with mental mental gymnastSomeone who excels at mental gymnastics; a person who thinks creatively and effortlessly.