/ Dictionary / Index P platitudinal: Meaning and Definition of Find definitions for: plat•i•tu•di•nal Pronunciation: (plat"i-td'n-ul, -tyd'-), [key] — adj. platitudinous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: platitudinal (Thesaurus) platitude platitudinarian 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