Definitions
1.nounA fin-like structure to the rear of the keel of a vessel that supports the rudder and protects a propeller.
2.nounA similar construction on a boat that acts as a keel.
3.nounA fin that serves to stabilize a surfboard.
4.nounA surfer; a person who leads a surfing lifestyle.
5.nounA sort of wild plum (Prunus spinosa or Prunus domestica subsp. insititia (syn. Prunus institia)).
6.nounA kind of oat.