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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Rocket Lab has also flown seven missions with HASTE, a suborbital version of Electron designed to help customers test hypersonic technologies, bringing the company's overall liftoff tally to 83. Mike Wall, Space.com, 6 Mar. 2026 In May 2025, Hermeus completed the first flight of its Quarterhorse Mk 1, a high-speed uncrewed aircraft designed to validate critical systems for future hypersonic operations. Jijo Malayil, Interesting Engineering, 5 Mar. 2026 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, 4 Mar. 2026 Today, Hermeus aims to surpass that record with its Quarterhorse aircraft, which is being developed as a precursor to an even more ambitious reusable Darkhorse hypersonic aircraft intended for defense and national security applications. David Szondy march 03, New Atlas, 3 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 16 Mar. 2026.

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