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).
A connected set of flights of stairs; a stairwell.
A flight of stairs; a stairway.
A set of locks (enclosed sections of waterway) mounted one above the next.
To modify (a signal, a graph, etc.) to reduce a smooth curve to a series of discrete steps.
To increase one's share in a co-ownership.