1) to take possession of (a region, country) (usually by force) (annex)

2) to take possession of (private property) without payment (as punishment or to enforce authority) (confiscate)

3) to defeat (and take possession of)(a country, army etc) by force (conquer)

4) to take possession of (something) by law or by authority (impound)

5) to take hold of (a person, thing) suddenly and with force; to take possession of (property etc) (seize)