hypersonic

adjective

hy·​per·​son·​ic ˌhī-pər-ˈsä-nik How to pronounce hypersonic (audio)
1
: of or relating to speed five or more times that of sound in air compare sonic
2
: moving, capable of moving, or utilizing air currents that move at hypersonic speed
hypersonic wind tunnel
hypersonically adverb

Examples of hypersonic in a Sentence

Recent Examples on the Web
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Payloads included two satellites for the Missile Defense Agency to track hypersonic missiles and four more satellites for the Tranche 0 constellation for the Space Development Agency. Richard Tribou, The Orlando Sentinel, 14 Mar. 2026 As the 13th day of the Iran conflict draws to a close and with no end in sight, Iran is looking towards old tech to elevate its position in a war that has so far been dominated by hypersonic missiles. Eva Roytburg, Fortune, 13 Mar. 2026 While Golden Dome aims to intercept threats such as ICBMs and hypersonic missiles in space, SkyDefender’s upper layer functions primarily as an early-warning system. David Szondy march 12, New Atlas, 12 Mar. 2026 South Korea developing Mach 5 missiles The United States, Russia, and China currently operate hypersonic missiles. Chris Young, Interesting Engineering, 10 Mar. 2026 See All Example Sentences for hypersonic

Word History

Etymology

International Scientific Vocabulary

First Known Use

1946, in the meaning defined at sense 1

Time Traveler
The first known use of hypersonic was in 1946

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Cite this Entry

“Hypersonic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypersonic. Accessed 21 Mar. 2026.

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