/ Dictionary / Index L lubricant: Meaning and Definition of Find definitions for: lu•bri•cant Pronunciation: (l'bri-kunt), [key] — n. a substance, as oil or grease, for lessening friction, esp. in the working parts of a mechanism. —adj. capable of lubricating; used to lubricate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lubricant (Thesaurus) lubric lubricate Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language