1. 领先：precedence 优先 | precedency 领先 | precedent 先例

2. 上席：precedable 可能被超越 | precedency 上席 | precedented 有先例

3. 居先/上席/优越：precedence /优先/ | precedency /居先/上席/优越/ | precedent /先例/前例/惯例/判例/前的/例/

noun

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

Synonym: precessionprecedence

2. preceding in time

Synonym: priorityantecedenceantecedencyanteriorityprecedence

3. status established in order of importance or urgency

e.g. ...its precedence as the world's leading manufacturer of pharmaceuticals
national independence takes priority over class struggle

Synonym: precedencepriority