n.
1.a policy of creating strategic alliances in order to check the expansion of a hostile power or ideology or to force it to negotiate pecefully
2.(physics) a system designed to prevent the accidental release of radioactive material from a reactor
3.(military) the act of containing something or someone
Idiom of the Day
What one doesn't know won't hurt one.
what you do not know will not worry or harm you
What my aunt doesn't know won't hurt her and we don't need to tell her about the broken dish.