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altitude

[al-ti-tood, -tyood] /ˈæl tɪˌtud, -ˌtyud/
noun
1.
the height of anything above a given planetary reference plane, especially above sea level on earth.
2.
extent or distance upward; height.
3.
Astronomy. the angular distance of a heavenly body above the horizon.
4.
Geometry.
  1. the perpendicular distance from the vertex of a figure to the side opposite the vertex.
  2. the line through the vertex of a figure perpendicular to the base.
5.
Usually, altitudes. a high place or region:
mountain altitudes.
6.
high or important position, rank, etc.
Origin
1350-1400
1350-1400; Middle English < Latin altitūdō; see alti-, -tude
Related forms
altitudinous
[al-ti-tood-n-uh s, -tyood-] /ˌæl tɪˈtud n əs, -ˈtyud-/ (Show IPA),
adjective
Can be confused
altitude, elevation, height (see synonym study at height)
altitude, attitude.
Synonyms
1. elevation. 1, 2. See height.
Antonyms
2. depth.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for altitude
  • Once on the mountain, the young man's journal became little more than a catalog of his struggle with the altitude.
  • Biodiesel can gel at cooler temperatures, such as those experienced on a winter's day or at high altitude.
  • Polar flights often have to change altitudes or routes to avoid very cold air which could freeze their fuel.
  • This small, mountainous, landlocked country has a wide variety of climatic conditions because of its great range of altitude.
  • Other chapters focus on ailments related to altitude or excessive heat or cold.
  • The wide range in altitudes in this ecoregion results in two major forest zones.
  • We are soon soaring at an altitude of 800 feet, skimming over farmland and suburbia at 80 mph.
  • In fact, this plane set a new unofficial record for the highest altitude ever achieved by a propeller aircraft.
  • Pick a high altitude location that has you looking away from the city.
  • The high-altitude conditions were not conducive to sustenance farming, but they were ideal for growing flax.
British Dictionary definitions for altitude

altitude

/ˈæltɪˌtjuːd/
noun
1.
the vertical height of an object above some chosen level, esp above sea level; elevation
2.
(geometry) the perpendicular distance from the vertex to the base of a geometrical figure or solid
3.
(astronomy, nautical) Also called elevation. the angular distance of a celestial body from the horizon measured along the vertical circle passing through the body Compare azimuth (sense 1)
4.
(surveying) the angle of elevation of a point above the horizontal plane of the observer
5.
(often pl) a high place or region
Derived Forms
altitudinal, adjective
Word Origin
C14: from Latin altitūdō, from altus high, deep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for altitude
n.

late 14c., from Latin altitudinem (nominative altitudo) "height, altitude," from altus "high" (see old).

Online Etymology Dictionary, © 2010 Douglas Harper
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altitude in Science
altitude
  (āl'tĭ-td')   
  1. The height of an object or structure above a reference level, usually above sea level or the Earth's surface.

  2. Astronomy The position of a celestial object above an observer's horizon, measured in degrees along a line between the horizon (0°) and the zenith (90°). Unlike declination and celestial latitude—the corresponding points in other celestial coordinate systems—the altitude of star or other celestial object is dependent on an observer's geographic location and changes steadily as the sky passes overhead due to the rotation of the Earth. See more at altazimuth coordinate system.

  3. Mathematics The perpendicular distance from the base of a geometric figure, such as a triangle, to the opposite vertex, side, or surface.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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