Mach

noun

: a usually high speed expressed by a Mach number
an airplane flying at Mach 2

Examples of Mach in a Sentence

Recent Examples on the Web
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The new contract focuses on reducing the risk factors for Quarthorse, especially in propulsion, thermal management, and power generation, as well as being able to release payloads at speeds up to Mach 3. David Szondy june 04, New Atlas, 4 June 2026 Infinite Capital and Rabbit Capital led Mach Industries’ Series C funding round. Queenie Wong, Los Angeles Times, 3 June 2026 However, one of the most common misconceptions surrounding hypersonic weapons is that any missile traveling faster than Mach 5 qualifies as one. Kaif Shaikh, Interesting Engineering, 31 May 2026 That includes the Ford Mustang Mach-E, the Toyota bZ series, the Honda Prologue, Nissan’s growing EV lineup, Volkswagen’s electric models, and CDJR electric vehicles. Rancho Santa Fe Review, San Diego Union-Tribune, 26 May 2026 See All Example Sentences for Mach

Word History

Etymology

Mach number

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of Mach was in 1947

Browse Nearby Words

Cite this Entry

“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mach. Accessed 11 Jun. 2026.

Kids Definition

Mach

noun

Medical Definition

Mach

noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
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