★
noun.
1. height above sea level or some other level on the earth's surface.
△Ex. The airplane was flying at an altitude of 30,000 feet.
(SYN) elevation.
2. height above sea level.
△Ex. The altitude of Denver is 5,280 feet.
3. a high place; region of great height.
△Ex. At some altitudes snow never melts.
4. the vertical distance from the base of a geometrical figure to its highest point.
5. (Astronomy.) the height of a star, planet, or other heavenly body expressed as its angular distance above the horizon.
6. (Figurative.) position of high rank or great power.
(SYN) stature.
7. (in space navigation) the distance of a spacecraft from the surface of a reference body, such as the moon.
◇expr. altitudes, elevated regions; great heights.