/ Dictionary / Index P pessimistic: Meaning and Definition of Find definitions for: pes•si•mis•tic Pronunciation: (pes"u-mis'tik), [key] — adj. pertaining to or characterized by pessimism; gloomy: a pessimistic outlook. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pessimistic (Thesaurus) pessimist pest Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language