'Batwing' definitions:

Definition of 'batwing'

(from WordNet)
adjective
Formed or shaped like a bat's wing; "a dress with batwing sleeves"
noun
One of a pair of swinging doors (as at the entrance to a western saloon)

Definition of 'Batwing'

From: GCIDE
  • Bat's-wing \Bat's"-wing"\or Batwing \Bat"wing\, a. Shaped like a bat's wing; as, a bat's-wing burner. [1913 Webster]