an amount of liquid that has become too much for the object that contains it and flows or spreads out

The spillover from the adjacent river flooded the lower fields. 附近河流涨出的河水淹没了低地。

the effects of an activity that have spread further than was originally intended

We are now witnessing a spillover of the war into neighbouring regions. 我们现在亲眼看到战争影响到周边地区。