Dictionary.com

hypersonic

[ hahy-per-son-ik ]
/ ˌhaɪ pərˈsɒn ɪk /
Save This Word!

adjective
noting or pertaining to speed that is at least five times that of sound in the same medium.

COMPARE MEANINGS

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of hypersonic

First recorded in 1935–40; hyper- + sonic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use hypersonic in a sentence

British Dictionary definitions for hypersonic

hypersonic
/ (ˌhaɪpəˈsɒnɪk) /

adjective
concerned with or having a velocity of at least five times that of sound in the same medium under the same conditions

Derived forms of hypersonic

hypersonics, 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

Scientific definitions for hypersonic

hypersonic
[ hī′pər-sŏnĭk ]

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.
FEEDBACK