Altair

Al·tair

 (ăl-tīr′, -târ′, ăl′tīr′, -târ′)

n.

A very bright, variable binary star in the constellation Aquila, approximately 15.7 light years from Earth. Altair is one of the stars that make up the Summer Triangle.

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[Arabic (an-nasr) aṭ-ṭā'ir, the flying (eagle) : al-, the + ṭā'ir, flying, active participle of ṭāra, to fly; see ṭyr in Semitic roots.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Altair

(ˈæltɛə)

n

(Astronomy) the brightest star in the constellation Aquila. Visual magnitude: 0.77; spectral type: A7V; distance: 16.8 light years

[Arabic, from al the + tā'ir bird]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Al•tair

(ˈæl tɛər, -taɪ^ər, ælˈtɛər, -ˈtaɪ^ər)

n.

a first-magnitude star in the constellation Aquila.

[< Arabic (al-nasr) al-ṭā'ir (the) flying (eagle)]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Al·tair

(ăl-tīr′, ăl-târ′)

A very bright star in the constellation Aquila. It is a variable binary star. See Note at Rigel.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Thesaurus

Noun

1.

Altair - double star 15.7 light years from Earth; the brightest star in the Aquila constellation Aquila - a constellation in the Milky Way near Cygnus; contains the star Altair

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