lieutenant jg lieutenant-governorship • lieutenant junior grade · · · Info · Definitions · Synonyms · Characters · · lieutenant jg · · Text Common · · Latin · · Scripts 13 · · Length 5 · · 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 junior grade · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 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 t latin small letter t U+0074 u latin small letter u U+0075