Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “cylinder”


noun [C] (ENGINE PART)   /ˈsɪl·ən·dər/
the tube-shaped part of an engine inside of which the piston (= part that causes the fuel to produce power) moves up and down: The engine isn’t firing on all its cylinders.
(Definition of cylinder noun (ENGINE PART) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of cylinder

More American English definitions for “cylinder”

Definitions of “cylinder” in other dictionaries

Word of the Day


the quality of knowing someone very well, liking them a lot, and wanting to spend a lot of time together

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More