altitude
1. [ noun ] elevation especially above sea level or above the earth's surface
Synonyms: height
Examples:

"the altitude gave her a headache"

Related terms: elevation level ceiling ceiling
2. [ noun ] the perpendicular distance from the base of a geometric figure to opposite vertex (or side if parallel)
Related terms: distance
3. [ noun ] angular distance above the horizon (especially of a celestial object)
Synonyms: elevation ALT EL
Related terms: angular_position
Similar spelling:   alidade
  altitudinal
  alidad
  alated