Today's Word of the Day means...
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.
one of the brightest stars, with an apparent magnitude of 1.25. This star, at about 3,200 light-years' distance, is the most remote (and brightest intrinsically) of the 20 apparently brightest stars. It lies in the northern constellation Cygnus