Etymology: Middle English, from Latin altitudo height, depth, from altus high, deep — more at old
Date: 14th century
a. the angular elevation of a celestial object above the horizon
b. the vertical elevation of an object above a surface (as sea level or land) of a planet or natural satellite
(1) a perpendicular line segment from a vertex of a geometric figure (as a triangle or a pyramid) to the opposite side or the opposite side extended or from a side or face to a parallel side or face or the side or face extended
(2) the length of an altitude
2. a high level (as of quality or feeling) <the altitudes of his anger> 3. a. vertical distance or extent b. position at a height c. an elevated region ; eminence — usually used in plural Synonyms: see height • altitudinal adjective • altitudinous adjective
New Collegiate Dictionary. 2001.