(psychology, dated) A developmental disability in which the person has a very low intelligence quotient, usually below 70, plus difficulty in multiple areas of daily life. Evidence of this disability must have appeared before the person reached adulthood for diagnosis.

plural of plantation mentality

plural of mental breakdown

plural of mental asylum

plural of mental case

plural of mental block

plural of pack mentality

(informal) To become extremely angry. / (informal) To become wild with excitement.

Third-person singular simple present indicative form of go mental

Someone who excels at mental gymnastics; a person who thinks creatively and effortlessly. / (derogatory) One who uses complex arguments to justify what is otherwise unjustifiable.