transition altitude

noun

The altitude (which varies by country) above which an aircraft's barometric altimeters are set as if the sea-level atmospheric pressure were equal to 1013.25 hectopascals (regardless of the actual atmospheric conditions) and altitudes are reported as flight levels.

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Meanings

nountransition altitude (usually uncountable, plural transition altitudes)

plural transition altitudes

  1. uncountableusuallyaeronauticsThe altitude (which varies by country) above which an aircraft's barometric altimeters are set as if the sea-level atmospheric pressure were equal to 1013.25 hectopascals (regardless of the actual atmospheric conditions) and altitudes are reported as flight levels.

Translations

Finnish siirtokorkeus
  • siirtokorkeusaltitude above which barometric altimeters are set to measure altitude based on theoretical sea level atmospheric pressure
Cite this entry
APA

transition altitude. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/transition%20altitude

MLA

“transition altitude.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/transition%20altitude. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “transition altitude,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/transition%20altitude.

Source: transition altitude on Wiktionary, CC BY-SA 4.0.