/ Dictionary / Index P pleonasm: Meaning and Definition of Find definitions for: ple•o•nasm Pronunciation: (plē'u-naz"um), [key] — n. the use of more words than are necessary to express an idea; redundancy. an instance of this, as free gift or true fact. a redundant word or expression. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pleonasm (Thesaurus) pleon pleopod Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language