VEHICLE [C] › a set of parts in a motor vehicle or bicycle that control how fast the wheels turn: [usually plural] a mountain bike with 21 gears to change gear first/second/third, etc gear › a particular position of the gears in a motor vehicle or bicycle that controls how fast the wheels turn: The lights turned green, but I couldn't get into first gear.
CLOTHES/EQUIPMENT [U] › the clothes and equipment used for a particular purpose: sports/swimming gear I've left all my gear at home.