Meaning of CYLINDER in English

CYLINDER

(ENGINE PART) [noun] [C] - the tube-shaped device, found esp. in an engine, inside which the part of the engine which causes the fuel to produce power moves up and down He's just bought himself a powerful new car with a six-cylinder engine.The engine isn't firing on all its cylinders.

Cambridge English vocab.      Кембриджский английский словарь.