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[al-tair, -tahyuh r, al-tair, -tahyuh r] /ˈæl tɛər, -taɪər, ælˈtɛər, -ˈtaɪər/
a first-magnitude star in the constellation Aquila.
Origin of Altair
< Arabic (al-nasr) al-ṭā'ir (the) flying (eagle) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for Altair


the brightest star in the constellation Aquila. Visual magnitude: 0.77; spectral type: A7V; distance: 16.8 light years
Word Origin
Arabic, from al the + tā'ir bird
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 Altair

bright star in the constellation Aquila, 16c., from Arabic Al Nasr al Tair "the Flying Eagle," from tair, participle of tara "it flew."

Online Etymology Dictionary, © 2010 Douglas Harper
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Altair in Science
  (āl-târ', -tīr')   
A bright white star in the constellation Aquila. Altair is a main-sequence star in the Hertzprung-Russell diagram. It is the 12th brightest star in the night sky, with an apparent magnitude of 0.77. Altair, along with Vega and Deneb, form the Summer Triangle asterism. Scientific name: Alpha Aquilae.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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