The absolute height of a location, usually measured from sea level. / A vertical distance. / (geometry) The distance measured perpendicularly from a figure's vertex to the opposite side of the vertex.

plural of altitude

(aviation) The vertical distance between the airplane and the surface below.

(aviation) A measure of altitude inferred by the measurement of ambient pressure in differential with a reference pressure at a known altitude.

plural of absolute altitude

(idiomatic, archaic) drunk.

plural of pressure altitude

(aviation) The altitude (which varies by country) above which an aircraft's barometric altimeters are set as if the sea-level atmospheric pressure were equal to 1013.25 hectopascals (regardless of the actual atmospheric conditions) and altitudes are reported as flight levels.

plural of transition altitude

(medicine) A pathological condition caused by oxygen deficiency at high altitudes; symptoms include shortness of breath, nausea, and nosebleed.