double star: Meaning and Definition of

dou'ble star'

Pronunciation: [key]
— Astron. Astron.
  1. two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observeror those that are relatively close together and comprise a single physical systemCf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.