/ ˈsɒvrənti; NAmE ˈsɑːv-/ noun [ U ] ( formal )
1.
sovereignty (over sth) complete power to govern a country :
The country claimed sovereignty over the island.
the sovereignty of Parliament
( figurative )
the idea of consumer sovereignty
2.
the state of being a country with freedom to govern itself :
The declaration proclaimed the full sovereignty of the republic.
For more information see the Cultural Guide
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WORD ORIGIN
late Middle English : from Old French sovereinete , from soverain , based on Latin super above.