WATERBED Meaning of WATERBED in English wa ‧ ter ‧ bed /ˈwɔːtəbed $ ˈwɒːtər-, ˈwɑː-/ BrE AmE noun [countable] a bed with a part inside that is made of rubber and filled with water Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012