/ Dictionary / Index J jackscrew: Meaning and Definition of Find definitions for: jack•screw Pronunciation: ( jak'skr"), [key] — n. a jack for lifting consisting of a screw steadied by a threaded support and carrying a plate or other part bearing the load. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jackscrew (Thesaurus) jack salmon jackshaft Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language