/ Dictionary / Index I instancy: Meaning and Definition of Find definitions for: in•stan•cy Pronunciation: (in'stun-sē), [key] — n. quality of being instant; urgency; pressing nature. immediateness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instancy (Thesaurus) instance instant Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language