1. a room in which meals are eaten, as in a home or hotel, esp. the room in which the major or more formal meals are eaten.
2. Informal.the furniture usually used in a dining room and sometimes sold as a matching set, as a dining table, chairs, and sideboard; dining room suite: a sale on dining rooms.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.