with clouds in the sky and therefore not bright and sunny

The sky/weather was overcast. 天空／天气阴沉沉的。

a depressing, overcast winter morning 沉闷、阴暗的冬日早晨

Synonyms: cloudysunless

Opposites: cloudlesssunny (BRIGHT)

(of clouds) to cover the sky so it is not bright and sunny

Thick clouds overcast the sky. 厚厚的云层笼罩着天空。

to stitch over the edge of a piece of cloth to stop the loose threads from separating

Finish off the hem by overcasting. 用包边缝完成下摆。