In Science, altitude refers to: D. the angular height away from the horizon.
Altitude is also referred to as an elevation and it can be defined as the vertical distance (height) above a natural satellite or the surface of a planet such as land or sea level.
This ultimately implies that, an altitude is vertical height (elevation) of an object or physical body above a particular location or planetary reference plane such as land or sea level on Earth.
In conclusion, altitude is the angular height of an object or physical body away from the horizon.
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