from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The brightest star in the constellation Cygnus, approximately 1,630 light-years from Earth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A blue giant star in the constellation Cygnus; Alpha (α) Cygni. It forms one corner of the Summer Triangle. Deneb is one of the brightest stars in the night sky, and one of the most luminous stars known.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the brightest star in Cygnus
Arabic ḏanab, tail; see ḏnb in Semitic roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Arabic ذنب الدجاجة (dhanab ad-dajājah, "hen's tail"), from ذنب ("tail") + دجاجة ("hen"). (Wiktionary)