fisher UK /ˈfɪʃə/US /ˈfɪʃɚ/ noun3 •someone who catches the animals that swim in the sea or in rivers, using a line and a hookThe fishers who live here left for the mainland only days ago as an unseasonable October storm ravaged the islands. — 2021 •A North American marten-like mammal (Pekania pennanti), that has thick brown fur.In many ways the fisher resembles the pine marten, possessing many of the marten's tricks and manners. — 1969 •Fur of specimens of species Pekania pennanti. formsfishers