sweat lodge

plural sweat lodges

1. A structure in which people expose themselves to high-temperature air, often combined with steam or aromatic substances, as in a steam bath or sauna.

   He had made a bed of sage, had built a sweat lodge and purified himself in it.

   1951, Dorothy M. Johnson, Warrior's Exile; in Indian Country, London: Corgi, 1961, page 65

2. A ceremony or ritual using such a structure, generally for purposes of purification.