Definition of "cowfish"

Any of genera Acanthostracion and Lactoria, of the boxfish family Ostraciidae.  examples

A grampus (Grampus griseus), Risso's dolphin.  examples

A common bottlenose dolphin of California, Tursiops truncatus gillii.  examples

A marine plectognath fish, Acanthostracion quadricornis and allied species, having two projections, like horns, in front.  examples

A common galaxias (Galaxias maculatus)  examples