1. heights above sea level or above the earth’s surface
2. high places or regions
3. perpendicular distances from the base to the opposite vertex in geometric figures
Usage: geometry

Examples

• Commercial aircraft typically cruise at altitudes between 30,000 and 40,000 feet.
• Mountain climbers must adjust to breathing at high altitudes.
• The pilot reported flying at various altitudes to avoid turbulence.
• Plants growing at different altitudes show remarkable adaptations.
• Weather balloons can reach altitudes of over 100,000 feet.
• The triangle’s three altitudes intersect at a single point.
• GPS devices can track both location and altitude accurately.