A wooden tower, usually movable, used in the middle ages in besieging fortifications. Probably, in its simplest form, it was a mere shed or…

A type of siege-tower, probably of larger than normal size, used by Richard I.

A movable tower used in sieges. Cf. summertower, n.

A tower or bastion of a castle; a fortified tower; a small fortress.

In other transferred uses. In ancient and medieval warfare, a tall movable structure, used in storming a fortified place. Cf. summercastle, n.

A movable tower used in sieges; = summercastle, n. 2.

A wooden siege tower; = bastille, n. 1b.

A temporary hut or tower erected by a besieging force. Cf. bastille, n. 1. Obsolete (historical in later use).

Military. = tower, n.1 5a. Obsolete. rare.

a wooden tower on wheels formerly used in sieges.

An ancient besieging engine, a kind of movable tower.

(see 6).