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, 4 Jan. 2026 That parade, previously covered by Interesting Engineering, highlighted Beijing’s growing emphasis on long-range and hypersonic strike capabilities. Kaif Shaikh, Interesting Engineering, 29 Dec. 2025 The missiles would be hypersonic – more than five times the speed of sound – and maneuverable to confuse enemy defenses. Brad Lendon, CNN Money, 23 Dec. 2025 Beijing already operates thousands of high-end ballistic, hypersonic, and cruise missiles that would be used to strike U.S. forward bases, aircraft carriers, tanker aircraft, and other key large assets. Justin Bronk, Foreign Affairs, 15 Dec. 2025 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

Browse Nearby Words

Cite this Entry

“Hypersonic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hypersonic. Accessed 6 Jan. 2026.

Last Updated: - Updated example sentences
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