Definition of waterbed noun from the Oxford Advanced American Dictionary

 

waterbed

 noun
noun
NAmE//ˈwɔt̮ərˌbɛd//
 
, NAmE//ˈwɑt̮ərˌbɛd//
 
 
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a bed with a rubber or plastic mattress that is filled with water
See the Oxford Advanced Learner's Dictionary entry: waterbed