containment

noun

1. (uncountable)The state of being contained.

   “A new siding and turnback facility at Midleton will also be developed, along with new cable containment routes.”

2. (countable, uncountable)The state of containing.
3. (countable, obsolete, uncountable)Something contained.

   “The containment of a rich man's estate.”

4. (countable, uncountable)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.

   “Mr. Putin has reinvigorated an alliance that spent years confused about its purpose once it lost the adversary it was formed to contain, the Soviet Union. Now, containment is back.”

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)An inclusion.