Containment (noun)

1. The action of keeping something harmful under control or within limits.
2. The action or policy of preventing the expansion of a hostile country or influence.

Origin:

From contain + -ment, influenced by french containment ('contention, constraint').

Examples:

1. The containment of the virus was a top priority for the government.
2. The containment of the fire took several days.
3. The strategy of containment proved successful during the Cold War.