: 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
Stephen Clark, ArsTechnica, 26 Apr. 2025
Hypersonic weapons travel at speeds upward of five times the speed of sound, also referred to as Mach 5 and roughly equivalent to over 3,800 miles per hour.
—Thomas G. Moukawsher, MSNBC Newsweek, 24 Apr. 2025
The demonstrator aircraft, a prelude to the company’s commercial jet — dubbed the Overture — accelerated to Mach 1.05 within about 11 minutes of taking off, according to the company and a live video of the test flight.
—John Aguilar, Denver Post, 24 Apr. 2025
The flight lasted 14 hours and 38 minutes at an average cruise speed of Mach 0.87.
—Michael Verdon, Robb Report, 23 Apr. 2025
See All Example Sentences for mach
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Noun
Dark Eagle is designed to fly at speeds exceeding Mach 5, or 3,800 mph, with a reported range of 1,725 miles (2,775 kilometers), sufficient to reach Taiwan from Guam, or NATO's borders with Russia from Western Europe.
—Stephen Clark, ArsTechnica, 26 Apr. 2025
Hypersonic weapons travel at speeds upward of five times the speed of sound, also referred to as Mach 5 and roughly equivalent to over 3,800 miles per hour.
—Thomas G. Moukawsher, MSNBC Newsweek, 24 Apr. 2025
The demonstrator aircraft, a prelude to the company’s commercial jet — dubbed the Overture — accelerated to Mach 1.05 within about 11 minutes of taking off, according to the company and a live video of the test flight.
—John Aguilar, Denver Post, 24 Apr. 2025
The flight lasted 14 hours and 38 minutes at an average cruise speed of Mach 0.87.
—Michael Verdon, Robb Report, 23 Apr. 2025
See All Example Sentences for mach
Cite this Entry
“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 11 May. 2025.
Copy CitationKids Definition
Mach
nounMedical Definition
Mach
noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Biographical Definition
Love words? Need even more definitions?
Merriam-Webster unabridged
Share