: 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
Marcia Dunn, Chicago Tribune, 11 Apr. 2026
The system reaches speeds above Mach 5 and covers distances between 2,700 and 3,500 kilometers (about 1,700 to 2,200 miles).
—Aamir Khollam, Interesting Engineering, 10 Apr. 2026
The Sheriff’s Office said investigators determined the 25-foot DCB Performance Marine Mach 26 catamaran was traveling upstream on the Colorado at a high speed at the time of the crash.
—Nicole Buss, Sacbee.com, 8 Apr. 2026
The fourth Quarterhorse will be built in El Segundo — with the goal of hitting Mach 3.
—Los Angeles Times, 7 Apr. 2026
See All Example Sentences for mach
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Noun
The lunar cruiser hit the atmosphere traveling Mach 33 — or 33 times the speed of sound — a blistering blur not seen since the 1960s and 1970s Apollo.
—Marcia Dunn, Chicago Tribune, 11 Apr. 2026
The system reaches speeds above Mach 5 and covers distances between 2,700 and 3,500 kilometers (about 1,700 to 2,200 miles).
—Aamir Khollam, Interesting Engineering, 10 Apr. 2026
The Sheriff’s Office said investigators determined the 25-foot DCB Performance Marine Mach 26 catamaran was traveling upstream on the Colorado at a high speed at the time of the crash.
—Nicole Buss, Sacbee.com, 8 Apr. 2026
The fourth Quarterhorse will be built in El Segundo — with the goal of hitting Mach 3.
—Los Angeles Times, 7 Apr. 2026
See All Example Sentences for mach
Cite this Entry
“Mach.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mach. Accessed 29 Apr. 2026.
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Mach
nounMedical Definition
Mach
noun
: a usually high speed expressed by a Mach number
an airplane flying at Mach 2
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