/ Dictionary / Index D dece: Meaning and Definition of Find definitions for: dece Pronunciation: (dēs), [key] — adj. Slang. great, wonderful. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. decd. decease Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language