/ Dictionary / Index I it'll: Meaning and Definition of Find definitions for: it'll Pronunciation: (it'l), [key] contraction of it will. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -itive Ito Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language