mach.

¹ American  

abbreviation

1. machine.

2. machinery.

3. machinist.

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mach ² American  

[mahk] / mɑk /

Or Mach

noun

1. mach number.

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Mach ³ American  

[mahk, mahkh] / mɑk, mɑx /

noun

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

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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

The company plans next year to break the Mach 5 threshold that is considered hypersonic.

From The Wall Street Journal

Mach Van Si, a farmer in Dak Lak, told AFP: "Our neighbourhood was completely destroyed. Nothing was left. Everything was covered in mud."

From BBC

In the hard-hit mountainous province of Dak Lak, 61-year-old farmer Mach Van Si said the floodwaters left him and his wife stranded on their sheet-metal rooftop for two nights.

From Barron's

Known as Overture, the aircraft is designed to cruise at Mach 1.7 on transoceanic routes, or twice as fast as today’s airliners.

From The Wall Street Journal

To travel from Los Angeles to Sydney in sixty minutes, an aircraft would need to reach Mach 10.

From Science Daily