1. the height of something above sea level or above the ground
2. the perpendicular distance from the base of a geometric figure to the opposite vertex or side
Usage: geometry

Examples

• The airplane reached an altitude of 30,000 feet.
• Mountain climbers often experience difficulty breathing at high altitudes.
• The city is located at an altitude of 5,280 feet above sea level.
• Pilots must monitor their altitude carefully during flight.
• To find the area of a triangle, multiply the base by the altitude and divide by two.
• The satellite orbits at an altitude of 200 miles above Earth.