A Conservatory

1. (obsolete) That which preserves from injury.
2. A storehouse.
3. A large greenhouse or hothouse for the display of plants

Synonyms: greenhouse, hothouse, orangery, planthouse

4. (chiefly Britain, Ireland) A glass-walled and -roofed room in a house

Synonyms: sunroom, solarium, Florida room

5. A school of music or drama

Synonym: conservatoire