Bull's-eye

Bull's·-eye

Bull's-eye

n.
  1. A small circular or oval wooden block without sheaves, having a groove around it and a hole through it, used for connecting rigging. (Naut.)
  2. A small round cloud, with a ruddy center, supposed by sailors to portend a storm.
  3. A small thick disk of glass inserted in a deck, roof, floor, ship's side, etc., to let in light.
  4. A circular or oval opening for air or light.
  5. A lantern, with a thick glass lens on one side for concentrating the light on any object; also, the lens itself.
  6. Aldebaran, a bright star in the eye of Taurus or the Bull. (Astron.)
  7. The center of a target. (Archery & Gun.)
  8. A thick knob or protuberance left on glass by the end of the pipe through which it was blown.
  9. A small and thick old-fashioned watch. [Colloq.]
  10. something that exactly succeeds in achieving its goal; as, to score a bull's eye.