A reference to the angular elevation of a celestial object above the horizon of the Earth: The altitudinal elevation is the height of something above a surface, such as sea level or the land of a planet, a natural satellite, or any object out in space and above anything else.

Blindness in the upper or lower half of the visual field of one or both eyes: When Jane was at the ophthalmologist's office, her eyes were tested and the results showed an affliction with altitudinal hemianopia which was the cause of her loss of part of her vision.