A room used to grow plants. / A room used to house large machinery (plant), such as air-conditioning equipment.

A room in a home or hotel set aside for the use of visiting guests.

A room in a home set aside for sewing.

A room in a building, such as an office building, set aside for the use of people to hold meetings.

A dedicated space in a library, or similar institution of learning, set aside for reading. / A reference library.

(nautical) A compartment on a ship in which the engine machinery is located. / (idiomatic) The source of power in a team or other group. / (sports) The midfield.

A room in a school set aside for instruction in the visual arts.

(Britain) A multifunctional room that can be used for any purpose in a palace or castle. / (Britain, somewhat dated) Any room where visitors may be entertained; now, the living room.

Room or space in which to move or maneuver. / (figuratively) Freedom or leeway.

A room in a store for trying on clothes before purchase.