Definition of "cylinder"

(geometry) A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.  examples

(geometry) A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.  examples

Any object in the form of a circular cylinder.  quotations  examples

A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.  examples

(automotive) The space in which a piston travels inside a reciprocating engine or pump.  examples

A container in the form of a cylinder with rounded ends for storing pressurized gas; a gas cylinder.  examples

An early form of phonograph recording, made on a wax cylinder.  examples

The part of a revolver that contains chambers for the cartridges.  examples

(computing) The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.  examples

(transitive) To calender; to press (paper, etc.) between rollers to make it glossy.  examples