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altimeter Syllabification: al·tim·e·ter
Pronunciation: /alˈtimidər/
(abbreviation: alt.)

Definition of altimeter in English:


An instrument for determining altitude attained, especially a barometric or radar device used in an aircraft.
Example sentences
  • On entering the water, I am immediately on an undersea treadmill, legs pumping furiously, pressure gauge falling like the altimeter of a crashing aircraft.
  • They had not yet gotten used to flying blacked out over shifting sand dunes and having their attention refocused every time the radar altimeter indicated less than 10 feet above the ground.
  • At a height of 60 kilometres, it will be able to detect its own altitude using a pair of radar altimeters, which will be able to measure the exact distance to the surface.


Early 20th century: from Latin altus 'high' + -meter.

Definition of altimeter in:

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