arcturus Meaning, Definition & Usage

  1. noun the 4th brightest star and the brightest star in the constellation Bootes; 36 light-years from Earth

WordNet

Arc*tu"rus noun
Etymology
L. Arcturus, Gr. bearward, equiv. to bear + ward, guard. See Arctic.
Definitions
  1. (Anat.) A fixed star of the first magnitude in the constellation Boötes. ✍ Arcturus has sometimes been incorrectly used as the name of the constellation, or even of Ursa Major.
    Canst thou guide Arcturus with his sons [Rev. Ver.: "the Bear with her train"]. Job xxxviii. 32.

Webster 1913