Русско-англо-русский юридический словарь

A unitary state is a state governed as one single power in which the central government is ultimately supreme and any administrative divisions (subnational units) exercise only powers that their central government chooses to delegate. (Wikipedia)

It could have, on the contrary, taken inspiration from Belgium’s political history in order to learn how the shift from a strong unitary state to a centrifugal federal state structure can be achieved in a peaceful, democratic and negotiated manner. (Independent)