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: a perpendicular line segment from a vertex (see vertex sense 2a) of a geometric figure (such 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. : vertical distance or extent. b. : position at a height.
Oct 19, 2023 · In astronomy, altitude has a somewhat different meaning. It describes the angle between the horizon and some point in the sky. For example, if a star is directly overhead, its altitude is 90 degrees. If a star has just set or is just about to rise, it is right at the horizon and has an altitude of 0 degrees.
noun [ C ] uk / ˈæl.tɪ.tʃuːd / us / ˈæl.tə.tuːd / Add to word list. height above sea level: We are currently flying at an altitude of 15,000 metres. Mountain climbers use oxygen when they reach higher altitudes. Thesaurus: synonyms, antonyms, and examples. the distance from the bottom to the top.
Elevation, or geometric height, is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
noun. the height of anything above a given planetary reference plane, especially above sea level on earth. Synonyms: elevation. extent or distance upward; height. Antonyms: depth. Astronomy. the angular distance of a heavenly body above the horizon. Geometry. the perpendicular distance from the vertex of a figure to the side opposite the vertex.
altitude. noun. /ˈæltɪtjuːd/. /ˈæltɪtuːd/. [countable, usually singular] the height above sea level. at an altitude of something We are flying at an altitude of 6 000 metres. The plane made a dive to a lower altitude. Extra Examples.
In aviation, the term elevation or aerodrome elevation is defined by the ICAO as the highest point of the landing area. It is often measured in feet and can be found in approach charts of the aerodrome. It is not to be confused with terms such as the altitude or height. [1]
