A large flat surface, finished with black slate or a similar material, that can be written upon with chalk and subsequently erased; a chalkboard.
To use a blackboard to assist in an informal discussion.
A corridor; a hallway.
A meal served and eaten at a college's hall.
A college's canteen, which is often but not always coterminous with a traditional hall.
A meeting room.
A building providing student accommodation at a university.
A living room.
A place for special professional education, or for conferring professional degrees or licences.
The principal room of a secular medieval building.
A manor house (originally because a magistrate's court was held in the hall of his mansion).