/ Dictionary / Index P pessimist: Meaning and Definition of Find definitions for: pes•si•mist Pronunciation: (pes'u-mist), [key] — n. a person who habitually sees or anticipates the worst or is disposed to be gloomy. an adherent of the doctrine of pessimism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pessimist (Thesaurus) pessimism pessimistic Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language