mach

¹ American  

[mahk] / mɑk /

Or Mach

noun

1. mach number.

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Mach ² American  

[mahk, mahkh] / mɑk, mɑx /

noun

1. Ernst 1838–1916, Austrian physicist, psychologist, and philosopher.

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mach. ³ American  

abbreviation

1. machine.

2. machinery.

3. machinist.

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Mach ¹ British  

/ mæk /

noun

1. short for Mach number

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Mach ² British  

/ max /

noun

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

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Mach Scientific  

/ 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.

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Usage

How fast is Mach 1? A Mach number is the ratio of an object's speed in a given medium to the speed of sound in that medium. Mach 1, then, is the speed of sound, around 761 mph at sea level on a standard day. The term is also used as a metaphor for high speeds more generally. How to pronounce Mach 1[ mahk wuhn ]

Etymology

Origin of mach

After Ernst Mach

Example Sentences

Air Force Captain Kristin "BEO" Wolfe performs the "high-speed pass" maneuver at approximately .95 mach, which is just below the speed of sound, at the 2020 Fort Lauderdale Air Show in Fort Lauderdale, Florida, U.S.

From Reuters • Nov. 16, 2021

I will be curious to see what mach his framework has achieved by then.

From Forbes • Mar. 10, 2013

A "mach meter," an aerial speedometer, in view of passengers in the first few rows reached mach 1.

From Time Magazine Archive

Sponsors of the experiment were engineers from the Stanley Aviation Corp., which is building the escape capsule for the Air Force's new mach 2 bomber, the B58 Hustler.

From Time Magazine Archive

He had never cared mach for his own poems, he says, Byron had outdone him in popularity, and the Muse—"the Good Demon" who once deserted Herrick—came now less eagerly to his call.

From Waverley by Scott, Walter, Sir