'Flying fish' definitions:

Definition of 'flying fish'

From: WordNet
noun
Tropical marine fishes having enlarged winglike fins used for brief gliding flight

Definition of 'Flying fish'

From: GCIDE
  • Flying fish \Fly"ing fish`\ (Zool.) A fish which is able to leap from the water, and fly a considerable distance by means of its large and long pectoral fins. These fishes belong to several species of the genus Exoc[oe]tus, and are found in the warmer parts of all the oceans. [1913 Webster]