or Mach

[ mahk ]

Origin of mach

After Ernst Mach

Other definitions for Mach (2 of 3)

[ mahk; German mahkh ]

  1. Ernst [ernst], /ɛrnst/, 1838–1916, Austrian physicist, psychologist, and philosopher.

Other definitions for mach. (3 of 3)


  1. machine.

  2. machinery.

  1. machinist. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use mach in a sentence

  • Machs ether not only conditions the behaviour of inert masses, but is also conditioned in its state by them.

    Sidelights on Relativity | Albert Einstein
  • Machs idea finds its full development in the ether of the general theory of relativity.

    Sidelights on Relativity | Albert Einstein

British Dictionary definitions for Mach (1 of 2)


/ (mæk) /

  1. short for Mach number

British Dictionary definitions for Mach (2 of 2)


/ (German max) /

  1. 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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Mach


[ mäk, mäKH ]

  1. Austrian physicist and philosopher who experimented with supersonic projectiles and the flow of gases, obtaining early photographs of shock waves and gas jets. His work laid an important foundation for later developments in the science of projectiles and aeronautical design, and the Mach number and Mach bands were named for him.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.