/ Dictionary / Index L ludicrous: Meaning and Definition of Find definitions for: lu•di•crous Pronunciation: (l'di-krus), [key] — adj. causing laughter because of absurdity; provoking or deserving derision; ridiculous; laughable: a ludicrous lack of efficiency. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ludicrous (Thesaurus) ludic Ludlow Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language