WATERSIDE Meaning of WATERSIDE in English wa ‧ ter ‧ side /ˈwɔːtəsaɪd $ ˈwɒːtər-, ˈwɑː-/ BrE AmE noun [singular] the area at the edge of a lake, river etc —waterside adjective :a waterside restaurant Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012