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