English

Alternative forms

• Karman line
• von Karman line / von Kármán line

Noun

Kármán line ‎(uncountable)

1. (aeronautics, astronomy) The altitude at which the atmosphere becomes too thin to support aerodynamic flight.

Usage notes

This is treated as the border between the Earth's atmosphere and outer space. It is defined as an altitude of 100km above sea level on Earth by the Fédération Aéronautique Internationale.

Synonyms

• von Karman limit / von Kármán limit
• Karman limit / Kármán limit
• Gabrielli-von Karman limit / Gabrielli-von Kármán limit

See also

• Armstrong line
• death zone