noun Astronomy.

a first-magnitude star in the constellation Cygnus.

Origin of Deneb

First recorded in 1865–70, Deneb is from the Arabic word dhanab a tail Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deneb

Historical Examples of deneb

  • Above him was the enormous triangle formed by Deneb, Vega, and Altair.

  • Canopus and Deneb, Rigel and Procyon, he would visit them all.

    Starman's Quest

    Robert Silverberg

  • During his transmigration he had been briefed for the trouble on Deneb IV.

  • But obviously, since he was weightless, he was not on Deneb IV.

  • Overhead Altair formed a great triangle with Deneb and Vega.

British Dictionary definitions for deneb



the brightest star in the constellation Cygnus and one of the brightest but remotest stars in the night sky. Visual magnitude: 1.25; spectral type: A2I

Word Origin for Deneb

C19: from Arabic dhanab a tail
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

Word Origin and History for deneb


1867, bright star in the tail of the constellation Cygnus the Swan, from Arabic Al Dhanab al Dajajah "the Hen's Tail."

Online Etymology Dictionary, © 2010 Douglas Harper

deneb in Science



A white supergiant star. It is the brightest star in the constellation Cygnus, with an apparent magnitude of 1.26. Deneb, along with Vega and Altair, form the Summer Triangle asterism. Scientific name: Alpha Cygnus. See Note at Rigel.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.