overcast sky 阴天天空
be overcast 天空阴沉
overcast weather 阴天
overcast conditions 多云天气状况
sky becomes overcast 天空变阴
A: Do you think it will rain if the sky overcasts?
A：如果天空变阴，你觉得会下雨吗？
B: Yes, when it overcasts like this, rain is very likely.
B：是的，像这样阴天时很可能会下雨。
1) 天空被云层遮住变阴的状态
2) 用作动词表示使天空阴沉
3) 比喻情绪或气氛变得低沉
1. 天空被云层覆盖，变得阴暗
2. 使天空或环境变得阴暗的过程
verb
1. To cover the sky with clouds, making it dull or dark.
Synonym: cloud, darken