: a number representing the ratio of the speed of a body (such as an aircraft) to the speed of sound in a surrounding medium (such as air)
Dictionary Entries Near Mach number
Cite this Entry
“Mach number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mach%20number. Accessed 22 Nov. 2024.
Copy CitationKids Definition
Mach number
noun
: a number representing the comparison of the speed of a body to the speed of sound in the surrounding atmosphere
a Mach number of 2 indicates a speed that is twice the speed of sound
Medical Definition
Mach number
noun
: a number representing the ratio of the speed of a body to the speed of sound in a surrounding medium (as air)
a Mach number of 2 indicates a speed that is twice that of sound
Love words? Need even more definitions?
Merriam-Webster unabridged
Share