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

a small bedroom in a house, often used for storage.

A room with many glass windows or walls.

(idiomatic) To rearrange or organize existing people, objects, furniture, belongings, etc., to create space for new objects.

plural of chat-room

A limited-access room in a larger building dedicated to HVAC equipment and other machinery.

A small room in a hospital etc where a physician may examine a patient with some privacy.

(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.

A room used to store gunpowder, particularly (historical) on a ship equipped with cannon. / (historical) A room used to powder hair and wigs.

(idiomatic) A problem or difficult issue that is very obvious, but is ignored for the convenience or comfort of those involved.