n. (pt same or es) 1 vertebrate coldblooded animal with gills and fins living wholly in water. 2 any of various nonvertebrate animals living wholly in water, e.g. the cuttlefish, shellfish, and jellyfish. 3 fish as food. 4 colloq. person of a specified, usu. unpleasant, kind (an odd fish). 5 (the Fish or Fishes) sign or constellation Pisces. u. 1 try to catch fish. 2 fish in (a certain river, pool, etc.).
