lieutenant junior grade lieutenant jg • lieutenantry · · · Info · Definitions · Synonyms · Characters · · lieutenant junior grade · · Text Common · · Latin · · Scripts 23 · · Length 7 · · Syllables Definitions · · · (noun) an officer holding a commissioned rank in the United States Navy or United States Coast Guard; below lieutenant and above ensign. Synonyms: lieutenant junior grade, lieutenant JG. · · Noun Definition 1 Synonyms · · · lieutenant jg · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 j latin small letter j U+006A l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075