: 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
Marisa Garcia, Forbes.com, 9 June 2025
One of Trump's orders directs the FAA to eliminate the 1973 speed restriction that prohibits flights over Mach 1 and replace it with a noise standard.
—Josh Funk, Arkansas Online, 8 June 2025
Russian President Vladimir Putin described the missile as a new hypersonic intermediate-range ballistic missile (IRBM), able to travel long distances at 10 times the speed of sound, or Mach 10.
—Ellie Cook, MSNBC Newsweek, 6 June 2025
Even during the days of Concorde, the supersonic plane that retired in 2003, commercial flying at speeds above Mach 1 over mainland US was strictly forbidden, largely due to concerns over noise pollution from sonic booms.
—Edward Russell, CNN Money, 5 June 2025
See All Example Sentences for mach
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Noun
The existing noise rules have been in place since 1968, and a corresponding FAA restriction on flights exceeding Mach 1 established in 1970.
—Marisa Garcia, Forbes.com, 9 June 2025
One of Trump's orders directs the FAA to eliminate the 1973 speed restriction that prohibits flights over Mach 1 and replace it with a noise standard.
—Josh Funk, Arkansas Online, 8 June 2025
Russian President Vladimir Putin described the missile as a new hypersonic intermediate-range ballistic missile (IRBM), able to travel long distances at 10 times the speed of sound, or Mach 10.
—Ellie Cook, MSNBC Newsweek, 6 June 2025
Even during the days of Concorde, the supersonic plane that retired in 2003, commercial flying at speeds above Mach 1 over mainland US was strictly forbidden, largely due to concerns over noise pollution from sonic booms.
—Edward Russell, CNN Money, 5 June 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 13 Jun. 2025.
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Mach
nounMedical Definition
Mach
noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
Biographical Definition
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