1. a building containing bathing facilities, especially public baths or changing rooms for swimmers
2. a small building or structure containing a bathroom, typically separate from the main house

Examples

• The old Roman bathhouse ruins still attract many tourists.
• We changed into our swimsuits at the beach bathhouse.
• The resort’s bathhouse featured hot springs and saunas.
• They built a small bathhouse behind their cabin.
• The public bathhouse was renovated last year.
• Visitors must use the bathhouse facilities before entering the pool.
• The historic bathhouse now serves as a museum.