# altitude

[ al-ti-tood, -tyood ]

/ ˈæl tɪˌtud, -ˌtyud /

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### noun

the height of anything above a given planetary reference plane, especially above sea level on earth.

extent or distance upward; height.

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.
- the line through the vertex of a figure perpendicular to the base.

Usually altitudes. a high place or region: mountain altitudes.

high or important position, rank, etc.

## QUIZZES

#### QUIZ YOURSELF ON PARENTHESES AND BRACKETS APLENTY!

Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!

Question 1 of 7

Let’s start with some etymology: What are the origins of the typographical word “bracket”?

First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.

First appeared in 1610, based on the French word “baguette” for the long loaf of bread.

First appeared in 1555, and is related to the French word “raquette” for a netted bat.

TAKE THE QUIZ TO FIND OUT ## Meet Grammar Coach

Improve Your Writing## synonym study for altitude

1, 2. See height.

## OTHER WORDS FROM altitude

al·ti·tu·di·nous [al-ti-tood-n-uhs, -tyood-], /ˌæl tɪˈtud n əs, -ˈtyud-/, adjective## Words nearby altitude

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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## British Dictionary definitions for altitude

altitude

/ (ˈæltɪˌtjuːd) /

### noun

the vertical height of an object above some chosen level, esp above sea level; elevation

geometry the perpendicular distance from the vertex to the base of a geometrical figure or solid

Also called: elevation astronomy nautical the angular distance of a celestial body from the horizon measured along the vertical circle passing through the bodyCompare azimuth (def. 1)

surveying the angle of elevation of a point above the horizontal plane of the observer

(often plural) a high place or region

## Derived forms of altitude

altitudinal, adjective## Word Origin for altitude

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

## Scientific definitions for altitude

altitude

[ ăl′tĭ-tōōd′ ]

The height of an object or structure above a reference level, usually above sea level or the Earth's surface.

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.

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
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