premonitor

n.预先警告者

一个概念或现象能够预示（尤指不详的）未来事件。

名词

1、The sudden change in weather was seen as a premonitor of the impending storm.
突然的天气变化被视为即将到来的风暴的预兆。

2、Some people believe that dreams can act as premonitors of future events.
有些人相信梦可以作为未来事件的预示。