bull's-eye Meaning, Definition & Usage

  1. noun a lantern with a single opening and a sliding panel that can be closed to conceal the light
    dark lantern.

WordNet

Bull's"-eye` noun
Definitions
  1. (Naut.) A small circular or oval wooden block without sheaves, having a groove around it and a hole through it, used for connecting rigging.
  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. Dickens.
  6. (Astron.) Aldebaran, a bright star in the eye of Taurus or the Bull.
  7. (Archery & Gun.) The center of a target.
  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.

Webster 1913