/ Dictionary / Index L LTJG: Meaning and Definition of Find definitions for: LTJG Pronunciation: [key] — U.S. Navy. U.S. Navy. Lieutenant Junior Grade. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lt. Inf. LTL Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language