Definition of "pintail"

A pintail duck, a type of dabbling duck with a characteristic pointed tail.

1. A northern pintail, Anas acuta, a dabbling duck of the northern hemisphere that has a long pointed tail.  examples

A pin-tailed snipe, Gallinago stenura.  examples

Any of various species of libellulid dragonfly of the genus Acisoma, endemic to Africa and Asia.  examples

(engineering) The end of a fastening pin or mandrel on a Huckbolt or pop rivet that is broken off when installation is complete.  quotations  examples

(surfing) A surfboard with a pointed back end.  examples