n.

1. （時間等方面的）在先，居前[U]
2. 優先，重點；優先權；先取權[U][（+over）]
   Safety has high priority in factories.

   工廠裡安全至關重要。

3. 優先考慮的事；優先配給[C]
   Road building is a top priority.

   築路是最優先考慮的事。

n.

1. the fact or condition of being regarded as more important.
   ▸a thing regarded as more important than others.
2. Brit. the right to proceed before other traffic.