altitudes
n. C / U B2 Upper Intermediate US //ˈæɫtɪˌtudz// UK //ˈæltɪtjˌuːdz// al·ti·tudes
n. the height of an object or place above sea level. You use this word when talking about how high a plane is flying or how high a mountain is.
n. the vertical distance of an object or point in relation to a specified datum, most commonly sea level. Often used in the plural to refer to high-elevation regions.
The plane flies at high altitudes to save fuel.
Mountain climbers often need time to adjust to the thin air found at high altitudes before reaching the summit.
The aircraft maintained a steady altitude of thirty thousand feet while navigating through the turbulent weather systems over the Atlantic Ocean.
Usage
Commonly used in the plural ('altitudes') when referring to general high-elevation environments or multiple measurements.