/ Dictionary / Index L lag screw: Meaning and Definition of Find definitions for: lag' screw" Pronunciation: [key] a heavy wood screw having a square or hexagonal head driven by a wrench. Also calledSee illus. under lag-screw Pronunciation: (lag'skr"), [key] — v.t. to fasten with a lag screw. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. La Granja Lagting 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