Fish1  —n. (pl. Same or -es) 1 vertebrate cold-blooded animal with gills and fins living wholly in water. 2 any of various non-vertebrate 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. —v. 1 try to catch fish. 2 fish in (a certain river, pool, etc.). 3 (foll. By for) a search for. B seek indirectly (fishing for compliments). 4 (foll. By up, out, etc.) Retrieve with effort.  drink like a fish drink alcohol excessively. Fish out of water person out of his or her element. Other fish to fry other matters to attend to. [old english]