n.

1. 先例，前例；【律】判例[C]
   This decision sets a precedent for future cases of a similar nature.

   这一裁决为今后性质类似的案件提供了判例。

2. 惯例[U]
   The Queen has broken with precedent by sending her children to ordinary schools.

   女王破例让自己的孩子去普通学校就读。

a.

1. 在前的，在先的，前面的[（+to）]
   Voters demanded that the candidates keep the pledges made as a condition precedent to election.

   选民们要求把候选人对他们誓言的履行作为选举的先行条件。

n.

adj.