- short for Mach number
WordReference Random House Learner's Dictionary of American English © 2025
mach or Mach /mɑk/USA pronunciation n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- the speed of an aircraft in relation to the speed of sound:The plane flew at Mach 3, three times the speed of sound.
mach
(mäk),USA pronunciation n.
Mach (mäk; Ger. mäкн),USA pronunciation n.
- Physicsa number indicating the ratio of the speed of an object to the speed of sound in the medium through which the object is moving. Abbr.: M Also, Mach. Also called mach number, Mach number. [after E. Mach]
Mach (mäk; Ger. mäкн),USA pronunciation n.
- Mechanical Engineeringmachine.
- Mechanical Engineeringmachinery.
- Mechanical Engineeringmachinist.
Collins Concise English Dictionary © HarperCollins Publishers::
Ernst ( ɛrnst ). 1838–1916, Austrian physicist and philosopher. He devised the system of speed measurement using the Mach number. He also founded logical positivism, asserting that the validity of a scientific law is proved only after empirical testing
'mach' also found in these entries (note: many are not synonyms or translations):
Belleville spring
- M
- Mach number
- accumulator
- addendum
- advance
- air cock
- air lance
- air spring
- air-cool
- alligator wrench
- allowance
- annular gear
- antifriction bearing
- arbor
- arch head
- arrest
- assembly
- assist
- autostability
- axle
- back shaft
- backlash
- backstay
- ball bearing
- ball valve
- band saw
- barrel
- batten
- beam
- bearing
- bell crank
- belt
- bevel gear
- big end
- bit
- bitbrace
- bite
- bitstock
- blast
- block
- blotter
- boom
- bore
- borer
- boring
- boss
- brace
- brass
- breech