/ Dictionary / Index L ladanum: Meaning and Definition of Find definitions for: lad•a•num Pronunciation: (lad'num), [key] — n. labdanum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ladanum (Thesaurus) lad ladder Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language