Definition of sauna noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈsɔːnə//
; NAmE NAmE//ˈsɔːnə//
; BrE BrE//ˈsaʊnə//
; NAmE NAmE//ˈsaʊnə//
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a period of time in which you sit or lie in a room (also called a sauna) which has been heated to a very high temperature. Some saunas involve the use of steam. a hotel with a swimming pool and sauna to have/take a sauna Word Originlate 19th cent.: from Finnish.
See the Oxford Advanced American Dictionary entry: sauna