/ Dictionary / Index L leaf lettuce: Meaning and Definition of Find definitions for: leaf' let"tuce Pronunciation: [key] a type of lettuce having loosely clustered, often curled leaves that are sometimes tinged with red. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leafleteer leaf miner 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