Definition of "Win"

Win¹

noun
plural Wins
1. (colloquial) A Winchester firearm.
  Quotations
  Pre-64 Win has a heritage that can't be beat. For me, it's Rems for prarie dogs and paper, Wins (or 1917 Enfields) for stuff that wants to stomp you into a greasy spot on the tundra.
  1997 December 23, Marcus [username], “Re: New Pre '64 or 700 action?”, in rec.guns‎ (Usenet)

Win²

proper noun
1. (computing) Windows, an operating system family developed by Microsoft.

Win³

proper noun
1. A diminutive of the female given name Winifred.
2. A diminutive of the male given name Winston.
  Quotations
  Winston Piper didn't look right to her in what she thought of as Flaherty's office. […] “My friends call me Win,” he said. “No need for formality.” ¶ “Sure, Win.” He's hinting.
  1994, Robert B. Parker, All Our Yesterdays, Dell Publishing, page 449

Win⁴

proper noun
plural Wins
1. A surname.