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[soo-per-son-ik] /ˌsu pərˈsɒn ɪk/
greater than the speed of sound waves through air.
capable of achieving such speed:
a supersonic plane.
Origin of supersonic
1915-20; super- + sonic
Related forms
supersonically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for supersonic
  • But the technology also opens the door for nastiness, especially during this season of supersonic emotions.
  • Then, drawing arrows and squiggles, he shot into supersonic lecture mode.
  • That's because, even at rest, the supersonic reconnaissance plane is so flat-out intimidating.
  • Next comes the blast, as the superheated air expands outward, initially at supersonic speeds.
  • The supersonic transport, soon to be upon us, will allow for no gam- bling more leisurely than cutting the deck.
  • It was as though they were sharing the stage with a set of supersonic lungs.
  • Watching supersonic jets perform stunts in tight formation can be thrilling, but is hardly the same as being there.
  • The scale by which supersonic speeds are measured is named for him.
  • Flight engineers define three categories of speed: subsonic, supersonic, and hypersonic.
  • The dream of commercial supersonic flight has remained elusive.
British Dictionary definitions for supersonic


being, having, or capable of reaching a speed in excess of the speed of sound: supersonic aircraft
Derived Forms
supersonically, adverb
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
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Word Origin and History for supersonic

1919, "of or having to do with sound waves beyond the limit of human hearing," from super- + sonic. Attested from 1934 in sense of "exceeding the speed of sound" (especially as a measure of aircraft speed), leaving the original sense to ultrasonic (1923).

Online Etymology Dictionary, © 2010 Douglas Harper
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supersonic in Medicine

supersonic su·per·son·ic (sōō'pər-sŏn'ĭk)

  1. Having, caused by, or relating to a speed greater than the speed of sound in a given medium, especially air.

  2. Of or relating to sound waves beyond human audibility.

su'per·son'i·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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supersonic in Science
Having a speed greater than that of sound in a designated medium, usually air; having a speed greater than Mach 1. Compare hypersonic, subsonic, transonic.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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