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
send (someone) up or send up (someone)
to sentence someone to prison
The judge sent the man up for seven years for robbing a bank.