change gear
B1Substantiv/US /tʃeɪndʒ ɡɪr/ chānj gĭr; UK /tʃeɪndʒ ɡɪr/ chānj gĭr/
A gear by means of which the speed of machinery or of a vehicle may be changed while that of the propelling engine or motor remains constant; -- called also change-speed gear.
