/ Dictionary / Index L lug nut: Meaning and Definition of Find definitions for: lug' nut" Pronunciation: [key] a large nut fitting on a heavy bolt, used esp. in attaching a wheel to a motor vehicle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. luggie Lugo Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language