interpositionсуществительное The act of placing something between other things, or the condition of being placed between other things. The interposition of a barrier prevented the two groups from clashing.
Interference or intervention by a third party in a situation, often to mediate or resolve a conflict. The interposition of the mediator helped to resolve the dispute between the two companies.
In U.S. history, the claimed right of a state to oppose actions of the federal government that the state deems unconstitutional. The doctrine of interposition was invoked by some states during the civil rights movement.