sau ‧ na /ˈsɔːnə $ ˈsɒːnə, ˈsaʊnə/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: Finnish ]
1 . a room that is heated to a very high temperature by hot air, where people sit because it is considered healthy
2 . a period of time when you sit or lie in a room like this
have/take a sauna
I have a sauna and massage every week.