pri‧ma‧cy AC /ˈpraɪməsi/ 
 noun [singular, uncountable] formal if someone or something has primacy, they are the best or most important person or thing
primacy of the primacy of the family
 the primacy of the family We must give primacy to education.
 We must give primacy to education.  [TahlilGaran] Dictionary of Contemporary English ▲