/ Dictionary / Index L let's: Meaning and Definition of Find definitions for: let's Pronunciation: (lets), [key] contraction of let us. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Letronne Lett Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language