- a surface or solid bounded by two parallel planes and generated by a straight line moving parallel to the given planes and tracing a curve bounded by the planes and lying in a plane perpendicular or oblique to the given planes.
- any cylinderlike object or part, whether solid or hollow.
- the rotating part of a revolver, containing the chambers for the cartridges.
- (in a pump) a cylindrical chamber in which a piston slides to move or compress a fluid.
- (in an engine) a cylindrical chamber in which the pressure of a gas or liquid moves a sliding piston.
- (in certain printing presses)
- a rotating cylinder that produces the impression and under which a flat form to be printed from passes.
- either of two cylinders, one carrying a curved form or plate to be printed from, that rotate against each other in opposite directions.
- (in certain locks) a cylindrical device for retaining the bolt until tumblers have been pushed out of its way.
- (in a screw or cylindrical gear) an imaginary cylindrical form, concentric to the axis, defining the pitch or the inner or outer ends of the threads or teeth.
- the tracks of a magnetic disk that are accessible from a single radial position of the access mechanism.
- the main roller on a carding machine, especially the roller covered with card clothing that works in combination with the worker and stripper rollers in carding fibers.
- a cylindrical or somewhat barrel-shaped stone or clay object bearing a cuneiform inscription or a carved design, worn by the Babylonians, Assyrians, and kindred peoples as a seal and amulet.
- to furnish with a cylinder or cylinders.
- to subject to the action of a cylinder or cylinders.
- a solid consisting of two parallel planes bounded by identical closed curves, usually circles, that are interconnected at every point by a set of parallel lines, usually perpendicular to the planes. Volume base area × length
- a surface formed by a line moving round a closed plane curve at a fixed angle to it
- any object shaped like a cylinder
- the chamber in a reciprocating internal-combustion engine, pump, or compressor within which the piston moves
- the rotating mechanism of a revolver, situated behind the barrel and containing cartridge chambers
- any of the rotating drums on a printing press
- a cylindrical seal of stone, clay, or precious stone decorated with linear designs, found in the Middle East and Balkans: dating from about 6000 bc
- a vertical cylindrical tank for storing hot water, esp an insulated one made of copper used in a domestic hot-water system
- working or performing at full capability
- to provide (a system) with cylinders
