/ Dictionary / Index L lumb-: Meaning and Definition of Find definitions for: lumb- Pronunciation: [key] var. ofbefore a vowel: lumbar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Luluabourg lumbago 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