Function: noun
Date: circa 1920
: the maximum height above sea level at which a particular airplane can maintain horizontal flight under standard air conditions ― called also ceiling
Function: noun
Date: circa 1920
: the maximum height above sea level at which a particular airplane can maintain horizontal flight under standard air conditions ― called also ceiling
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012