precedence

英 ['presɪd(ə)ns; prɪ'siːd(ə)ns] 美[prɪ'sidəns]

• n. 优先；居先

1. status established in order of importance or urgency;

"...its precedence as the world's leading manufacturer of pharmaceuticals"

"national independence takes priority over class struggle"

2. preceding in time

3. the act of preceding in time or order or rank (as in a ceremony)