Open English Wordnet
Nouns
(n)containmenta policy of creating strategic alliances in order to check the expansion of a hostile power or ideology or to force it to negotiate peacefully“containment of communist expansion was a central principle of United States' foreign policy from 1947 to the 1975”
(n)containment(physics) a system designed to prevent the accidental release of radioactive material from a reactor
(n)containmentthe act of containing; keeping something from spreading“the containment of the AIDS epidemic”, “the containment of the rebellion”