containment

Meanings

1. The state of being contained.
2. The state of containing.
3. Something contained.
4. A policy of checking the expansion of a hostile foreign power by creating alliances with other states; especially the foreign policy strategy of the United States in the early years of the Cold War.
5. A physical system designed to prevent the accidental release of radioactive or other dangerous materials from a nuclear reactor or industrial plant.
6. An inclusion.

Etymology

From contain + -ment.