/ Dictionary / Index D determinacy: Meaning and Definition of Find definitions for: de•ter•mi•na•cy Pronunciation: (di-tûr'mu-nu-sē), [key] — n. the quality of being determinate. the condition of being determined or mandated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. determinable determinant Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language