Basic Guidelines For English Spellings
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A new or alternative model of social organization, interaction, or control; (Politics) a new balance of power among nations, sometimes as manifested in arrangements established internationally for preserving political stability; especially (in recent use) the state of global politics and the global economy following the end of the Cold War.
The implication of order in the phrase is often not simply of a social system but also of social cohesion and lawful conduct.
Mid 19th century; earliest use found in Philip Bailey (1816–1902), poet. From new + world order.