/'presɪdəns; `prɛsədəns/
n [U] ~ (over sb/sth) right to come before sb/sth in time, order, rank, etc （在时间、顺序、行列等上）领先于某人[某事物]的权利; 优先权
*The longest-serving officer always takes precedence. 任职时间最长的官员事事优先.
* The elder son has precedence over the younger one. 长子较之非长子享有优先权.
* The needs of the community must take precedence over (ie must be met before) individual requirements. 公众的利益高于个人的利益.
* a list of the English aristocracy in order of precedence, ie in order of social rank 按社会等级排列的英国贵族名单.

n[U]
when someone or something is considered to be more important than someone or something else, and therefore comes first or must be dealt with first
= priorityprecedence over
　Do we want a society where appearance takes precedence over skill or virtue?
　Guests were seated in order of precedence .
　Safety must be given precedence .