Meaning & use
federation
A group of states or organizations united under a central authority while keeping some internal self-government.
See it in a sentence
Russia is officially known as the Russian Federation, made up of many regions.
The international chess federation sets the official rules for tournament play.
A note on using this word
'Federation' implies member states or groups keep significant independent power, unlike a fully centralized unitary state.
Words with a similar meaning
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