Webster’s Revised Unabridged Dictionary · 1913
Hothouse
Hot′house′ (·hous′), n. 1. A house kept warm to shelter tender plants and shrubs from the cold air; a place in which the plants of warmer climates may be reared, and fruits ripened.
2. A bagnio, or bathing house. [Obs.] Shak.
3. A brothel; a bagnio. [Obs.] B. Jonson.
4. (Pottery) A heated room for drying green ware.