noun
: a changing from one speed gear to another in a motor vehicle through a transmission employing a device by which both gears are brought to the same speed before the shift can be made
noun
: a changing from one speed gear to another in a motor vehicle through a transmission employing a device by which both gears are brought to the same speed before the shift can be made
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012