1. (Naut.)
Defn: 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.)
Defn: Aldebaran, a bright star in the eye of Taurus or the Bull.
7. (Archery & Gun.)
Defn: The center of a target.