gear box gearbox • gear brusher · · · Info · Definitions · Synonyms · Characters · · gear box · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (noun) the shell (metal casing) in which a train of gears is sealed. Synonyms: gearbox, gear box, gear case. · · Noun Definition 1 Synonyms · · · gearbox · · Synonym 1 gear case · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 o latin small letter o U+006F r latin small letter r U+0072 x latin small letter x U+0078