noun Aeronautics.

a ramjet engine in which the flow through the combustor itself is supersonic.

Origin of scramjet

1965–70; s(upersonic) c(ombustion) ramjet Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for scramjet



  1. a type of ramjet in which the forward motion of the craft forces oxygen to mix with fuel (usually hydrogen) at supersonic speeds within a duct in the engine
  2. an aircraft powered by such an engine
  3. (as modifier)scramjet technology

Word Origin for scramjet

C20: from s(upersonic) + c(ombustion) + ramjet
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