/ Dictionary / Index L leatherneck: Meaning and Definition of Find definitions for: leath•er•neck Pronunciation: (le'ur-nek"), [key] — n. Slang. a U.S. marine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: leatherneck (Thesaurus) leathern Leatheroid 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