cylinder

Short definition from Wiktionary

Noun

1. 1
   A surface created by projecting a closed two-dimensional curve along an axis intersecting the plane of the curve.
2. 2
   A solid figure bounded by a cylinder and two parallel planes intersecting the cylinder.
3. 3
   Any object in the form of a circular cylinder.
4. 4
   A cylindrical cavity or chamber in a mechanism, such as the counterpart to a piston found in a piston-driven engine.
5. 5
   The space in which a piston travels inside a reciprocating engine or pump.
6. 6
   A container in the form of a cylinder with rounded ends for storing pressurized gas; a gas cylinder.
7. 7
   An early form of phonograph recording, made on a wax cylinder.
8. 8
   The part of a revolver that contains chambers for the cartridges.
9. 9
   The corresponding tracks on a vertical arrangement of disks in a disk drive considered as a unit of data capacity.

Verb

1. 1
   To calender; to press (paper, etc.) between rollers to make it glossy.