Definition of "conservatory"

Having the quality of preserving from loss, decay, or injury.  examples

(rare) Relating to conservation.

(obsolete) That which preserves from injury.  quotations

A storehouse.  examples

A large greenhouse or hothouse for the display of plants  examples

(chiefly UK, Ireland) A glass-walled and -roofed room in a house  examples

A school of music or drama  examples