Definition of Ursa Major noun from the Oxford Advanced Learner's Dictionary

 

Ursa Major

 noun
noun
BrE BrE//ˌɜːsə ˈmeɪdʒə(r)//
 
; NAmE NAmE//ˌɜːrsə ˈmeɪdʒər//
 
(also the Great Bear)[singular](astronomy)
 
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a large group of stars that can be clearly seen from the northern hemisphere Word OriginLatin, from the story in Greek mythology that the nymph Callisto was turned into a bear and placed as a constellation in the heavens by Zeus.
See the Oxford Advanced American Dictionary entry: Ursa Major