the height of an object, e.g. an aircraft, or a place, esp above sea level
(also in pl) a high place or region
the angular distance of a planet, etc, above the horizon, used with the azimuth to fix the exact position of the planet, etc; elevation
the perpendicular distance from the base of a geometrical figure to the vertex or the side parallel to the base
altitudinal /-ʹtyoohdinl/ adj
[Middle English from Latin altitudo height, depth, from altus high, deep]