A piston is an engineering component of engines and pumps.
Piston(s) may also refer to:
Science and technology Misnomer for a hydraulic cylinder Piston (optics) Piston (subcellular structure) Piston valve Fire piston, an ancient device for kindling fire Gas-operated reloading, sometimes referred to as a gas piston. Piston, the working name for the Steam Machines gaming platform
People and groups Pist.On, an American heavy metal band Detroit Pistons, an American basketball team Steinbach Pistons, a Canadian ice hockey team Walter Piston, an American composer PISTON (transport group), a national federation of public transport associations in the Philippines
Other Piston (music), a type of oboe Piston controls the combination action on a pipe organ