Which term means to deprive of possession or to transfer another's property to oneself?

The term that means to deprive of possession or to transfer another's property to oneself is "expropriate." This word is often used in legal and governmental contexts, typically referring to the process by which a government can take private property for public use, with compensation. The essence of expropriation is that it involves the taking away of ownership or rights from one party and transferring them to another, usually for reasons of public benefit.

In contrast, the other terms have different meanings. "Exculpate" refers to clearing someone of blame or fault, particularly in a legal context. "Extant" describes something that is still in existence or currently existing, rather than relating to the transfer of possession. "Expedient" refers to a means of attaining an end that is convenient and practical, but may not be morally right or optimal. Each of these terms operates in distinct contexts and does not encompass the act of depriving someone of property, solidifying why expropriate is the correct choice in this scenario.