(a) a turbine in which the rotor is turned by a jet of water (now rare); (b) a turbojet engine.

A jet engine deriving its propulsive power from the combustion of fuel in a duct or tube into which air is admitted and compressed as a result of…

Used attributively and absol. to designate (an aircraft having) a type of jet engine in which the jet gases also power a turbine-driven compressor…

Used attributively and absol. to designate (an aircraft having) a jet engine in which a turbine is used as in a turbojet and also to drive a…

= turboprop, n.

any of a class of jet engines combining the operations of a turbojet and a ramjet, either as a turbo-jet with provision for afterburning, or as a…

Aeronautics. A jet engine employing such a fan for additional thrust; = fan-jet n. at fan, n.1 compounds 2.

An auxiliary, usually detachable, unit of one or more jet engines (usually rockets) for providing temporary extra thrust when an aircraft takes off.

a jet engine in which additional thrust is provided by cold air drawn by a fan through a duct surrounding the rest of the engine, which is used…

A ramjet in which combustion takes place in a stream of gas moving at supersonic speed.

The fitting of a turbofan engine with a new and quieter fan; refanning. Also: a refanned engine. rare.