What does the term 'absolute altitude' refer to?

The term 'absolute altitude' specifically refers to the height of an object or point above sea level. This is a crucial measurement in aviation and meteorology because it provides a standardized reference for altitude across different geographical areas, allowing pilots and meteorologists to communicate more effectively about an aircraft's or a weather phenomenon's elevation.

Absolute altitude contrasts with other forms of altitude measurements, such as relative altitude, which might refer to the height of an object above the ground level directly beneath it. By using absolute altitude measurements, pilots can ensure safe clearances from terrain and obstacles while also being aware of atmospheric conditions that can change with elevation. Understanding absolute altitude is vital for flight safety, particularly in relation to terrain, air traffic control, and weather patterns.