/ ˈpraɪməsi; NAmE / noun ( pl. -ies ) ( formal )
1.
[ U ] the fact of being the most important person or thing :
a belief in the primacy of the family
2.
[ C ] the position of an archbishop
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WORD ORIGIN
late Middle English : from Old French primatie , from medieval Latin primatia , from Latin primas , primat- of the first rank, from primus first.