/ Dictionary / Index L Lieut. Col.: Meaning and Definition of Find definitions for: Lieut. Col. Pronunciation: [key] lieutenant colonel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lieut. Lieut. Comdr. Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language