transition level

noun

The lowest flight level above the transition altitude; depends on the transition altitude and the measured or calculated sea-level atmospheric pressure. The flight level at which a descending aircraft's barometric altimeters are reset from a constant setting of 1013.25 hectopascals to the setting corresponding to the actual measured or calculated atmospheric pressure at mean sea level.

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Meanings

nountransition level (usually uncountable, plural transition levels)

plural transition levels

  1. uncountableusuallyaeronauticsThe lowest flight level above the transition altitude; depends on the transition altitude and the measured or calculated sea-level atmospheric pressure. The flight level at which a descending aircraft's barometric altimeters are reset from a constant setting of 1013.25 hectopascals to the setting corresponding to the actual measured or calculated atmospheric pressure at mean sea level.

Translations

Finnish siirtopinta
  • siirtopintalowest flight level above transition altitude
Cite this entry
APA

transition level. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/transition%20level

MLA

“transition level.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/transition%20level. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “transition level,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/transition%20level.

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