The European water vole, Arvicola amphibius, formerly Arvicola terrestris.
A member of the water police.
A water mouse, especially, the rakali, Hydromys chrysogaster.
Any of various aquatic or semi-aquatic rodents from Florida and southern Georgia, especially Neofiber alleni; the muskrat.
A petty thief or waterfront ruffian.
A person fond of water sports.
Any of three Old World vole species: the European water vole (Arvicola amphibius, formerly Arvicola terrestris), the montane water vole (Arvicola scherman), or the southwestern water vole (Arvicola sapidus).
The North American vole (Microtus richardsoni).