Definition of bastilles:
(n) :
A former fortress and prison in Paris, France, the storming of which in 1789 began the French Revolution.
(n) :
(figuratively) A jail or prison, especially one regarded as mistreating its prisoners.
(n) :
Chiefly in French contexts: a bastion (“projecting part of a rampart or other fortification”) or tower of a castle; also, a fortified tower or other building; or a small citadel or fortress.
(n) :
(figuratively) (British, derogatory) Synonym of workhouse (“an institution for homeless poor people funded by the local parish, where the able-bodied were required to work”).
(v) :
(transitive, also figuratively) To confine (someone or something) in, or as if in, a bastille (noun noun, sense 2.1) or prison; to imprison.
(n) :
(military, historical) The fortified encampment of an army besieging a place; also, any of the buildings in such an encampment.