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English definition of “cylinder”

cylinder

noun [C] uk   /ˈsɪl.ɪn.dər/ us    /-dɚ/

cylinder noun [C] (SHAPE)

a solid or hollow tube with long straight sides and two circular ends the same size, or an object shaped like this, often used as a container: Deep-sea divers carry cylinders of oxygen on their backs.

cylinder noun [C] (ENGINE PART)

the tube-shaped device, found especially in an engine, inside which the part of the engine that causes the fuel to produce power moves up and down: a six-cylinder engine
(Definition of cylinder from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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