/ Dictionary / Index A antidepressant: Meaning and Definition of Find definitions for: an•ti•de•pres•sant Pronunciation: (an"tē-di-pres'unt, an"tī-), [key] — Pharm. Pharm. —adj. of or pertaining to a substance that is used in the treatment of mood disorders, as characterized by various manic or depressive affects. —n. Also calledany such substance, as a tricyclic antidepressant, MAO inhibitor, or lithium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antidepressant (Thesaurus) anticyclone antiderivative Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language