freshwater /ˈfɹɛʃˌwɔːtə(ɹ)/adjective 4noun 1forms 1 adjective4 •Living in fresh water.The trout is a freshwater fish. •Consisting of fresh water.Lake Baikal is the world's largest freshwater lake in terms of volume. •(US) Neoclassical, in reference to the macroeconomics and economic departments near the Great Lakes.Meanwhile, the freshwater side of the dispute rapidly reverted to arguments from the nineteenth century, which had been debunked by Keynes and Irving Fisher. — 2012 •Unskilled as a seaman. noun1 •A body of fresh water.Fossils with low Sr/Ca ratios indicating origin in a freshwater of a type which has a low Sr/Ca ratio: […] — 1953 formsfreshwaters