jet engine

noun

: an engine that produces motion as a result of the rearward discharge of a jet of fluid

specifically : an airplane engine that uses atmospheric oxygen to burn fuel and produces a rearward discharge of heated air and exhaust gases see airplane illustration

Examples of jet engine in a Sentence

Recent Examples on the Web

Cobalt is the quiet backbone of modern industry, acting as a non-negotiable ingredient in many items from EV batteries to military jet engines and defense systems. — Mrigakshi Dixit, Interesting Engineering, 2 July 2026

The baseplate and three bridges of the RMUL4 are machined from grade 5 titanium—an aerospace-grade alloy used in jet engines and a defining staple in Richard Mille’s design language. — Richard Mille Contributor, Forbes.com, 25 June 2026

Tune out jet engines and loud talkers on your next flight with these Soundcore noise-canceling headphones. — Melony Forcier, Travel + Leisure, 23 June 2026

They’re used in a wide range of products, including smartphones, semiconductors, electric vehicles and jet engines. — ABC News, 20 June 2026

Word History

First Known Use

1933, in the meaning defined above

Kids Definition

jet engine

noun

: an engine that produces motion as a result of the rearward discharge of a jet of fluid

especially : an aircraft engine that uses atmospheric oxygen to burn fuel and produces a rearward discharge of heated air and exhaust gases