O OneWordDaily
AI-generated image
Word of the Day Tuesday, June 9, 2026

piston

/ˈpɪstən/ noun · British & US
Valid in UKValid in US
Share WhatsApp

What does piston mean?

noun

A moving part in an engine or machine that slides up and down in a cylinder, driven by the explosive force of a gas or vapor. A device that converts the pressure of a gas or vapor into mechanical motion.

Example

"The piston in the car engine was damaged and needed to be replaced."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for piston

Rhymes with piston

Etymologically related