/ Dictionary / Index L LTA: Meaning and Definition of Find definitions for: LTA Pronunciation: [key] (of an aircraft) lighter-than-air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lt Lt. Col. Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language