[ ram-jet ]
/ ˈræmˌdʒɛt /


a jet engine operated by the injection of fuel into a stream of air compressed by the forward speed of the aircraft.

Origin of ramjet

First recorded in 1940–45; ram1 + jet1
Also called ramjet engine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ramjet

  • A bunch of Australian bushmen stumbling onto a ramjet and trying to figure out how it works.

    Masters of Space|Edward Elmer Smith

British Dictionary definitions for ramjet


ramjet engine

/ (ˈræmˌdʒɛt) /


  1. a type of jet engine in which fuel is burned in a duct using air compressed by the forward speed of the aircraft
  2. an aircraft powered by such an engine
Also called: athodyd

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for ramjet


[ rămjĕt′ ]

A cylindrical jet propulsion engine consisting of air intake and combustion chambers into which burning fuel is injected, forcing hot air out of the rear of the engine at high pressures to provide forward thrust. See Note at turbojet.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.