/ Dictionary / Index I instantly: Meaning and Definition of Find definitions for: in•stant•ly Pronunciation: (in'stunt-lē), [key] — adv. immediately; at once. urgently. —conj. as soon as; directly: I recognized her instantly she entered the room. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: instantly (Thesaurus) instantize instant photography 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