/ Dictionary / Index L libelous: Meaning and Definition of Find definitions for: li•bel•ous Pronunciation: (lī'bu-lus), [key] — adj. containing, constituting, or involving a libel; maliciously defamatory. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: libelous (Thesaurus) libeler liber 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