containment

contain +‎ -ment

containment (countable and uncountable, plural containments)

1. (uncountable) The state of being contained.
2. (uncountable, countable) The state of containing.
3. (uncountable, countable) Something contained.
4. (uncountable, countable) 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. (countable) a physical system designed to prevent the accidental release of radioactive or other dangerous materials from a nuclear reactor or industrial plant.
6. (countable, mathematics) an inclusion

• rollback/regime change
• détente

• containment on Wikipedia.Wikipedia