: 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
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
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 24 Jun. 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