containment containment /kənˈteɪnmənt/

noun

1. The act of containing; keeping something from spreading  ( containment )
   the act of containing; keeping something from spreading
    The containment of the AIDS epidemic
   the containment of the AIDS epidemic
    The containment of the rebellion
   the containment of the rebellion
   
   
2. (physics) a system designed to prevent the accidental release of radioactive material from a reactor  ( containment )
   (physics) a system designed to prevent the accidental release of radioactive material from a reactor
    Nuclear power plants have stringent containment protocols to prevent radioactive leaks.
   Nuclear power plants have stringent containment protocols to prevent radioactive leaks.
   
   
3. A policy of creating strategic alliances in order to check the expansion of a hostile power, ideology or to force it to negotiate peacefully  ( containment )
   a policy of creating strategic alliances in order to check the expansion of a hostile power, 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
   containment of communist expansion was a central principle of United States' foreign policy from 1947 to the 1975