/ kənˈsɜːvətri; NAmE -ˈsɜːrvətɔːri/ noun ( pl. -ies )
1.
( BrE ) a room with glass walls and a glass roof that is built on the side of a house. Conservatories are used for sitting in to enjoy the sun, and to protect plants from cold weather.
2.
( NAmE ) = conservatoire
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WORD ORIGIN
mid 16th cent. (denoting something that preserves): from late Latin conservatorium , from conservare to preserve, from con- together + servare to keep.