See more synonyms for hypersonic on Thesaurus.com

Origin of hypersonic

First recorded in 1935–40; hyper- + sonic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hypersonic


  1. concerned with or having a velocity of at least five times that of sound in the same medium under the same conditions
Derived Formshypersonics, noun
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

hypersonic in Science


  1. Relating to or capable of speeds equal to or exceeding five times the speed of sound (Mach 5 and above). Compare subsonic supersonic transonic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.