/ Dictionary / Index D deciding: Meaning and Definition of Find definitions for: de•cid•ing Pronunciation: (di-sī'ding), [key] — adj. that settles a question or dispute or leads to a final decision; determining; decisive: the deciding vote; The weather will be the deciding factor as to whether we have the picnic or not. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deciding (Thesaurus) decided decidua Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language