mach

¹

or Mach

[ mahk ]

noun

1. mach number ( def ).

Mach

²

[ mahk; German mahkh ]

noun

1. Ernst [e, r, nst], 1838–1916, Austrian physicist, psychologist, and philosopher.

mach.

³

abbreviation for

1. machine.
2. machinery.
3. machinist.

Mach

¹

/ mæk /

noun

1. short for Mach number

Mach

²

/ max /

noun

1. MachErnst18381916MAustrianSCIENCE: physicistPHILOSOPHY: philosopher 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

/ 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.

Word History and Origins

Origin of mach¹

After Ernst Mach

Example Sentences

Iran unveiled the missile last year and claimed it could reach Mach 15 — or 15 times the speed of sound.

From Seattle Times

Hypersonic weapons are designed to exceed Mach 5, or five times the speed of sound, posing a threat to regional missile-defense systems with their speed and maneuverability.

From Seattle Times

The other crash involving a Mach E killed two people around 3:20 a.m.

From Seattle Times

Ford, for instance, cut production of the F-150 Lightning electric pickup, and lopped up to $8,100 off the price of the Mustang Mach E electric SUV in order to sell 2023 models.

From Seattle Times

The military also killed 24 insurgents after coming under attack in Mach, a district in Baluchistan, last week.

From Seattle Times