Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the …

: the vertical elevation of an object above a surface (such as sea level or land) of a planet or natural satellite.

Find the elevation, altitude or relief of a location or path drawn on a map. This elevation tool allows you to see a graph of elevations along a path.

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Altitude is also the distance measured by an angle made by a point on the earth to a star and to the horizon (= place where earth and sky seem to meet).

Altitude definition: the height of anything above a given planetary reference plane, especially above sea level on earth.. See examples of ALTITUDE used in a sentence.

May 30, 2025 · Altitude, like elevation, is the distance above sea level. Areas are often considered "high- altitude " if they reach at least 2,400 meters (8,000 feet) into the atmosphere.