overcast

US /ˈoʊ.vɚ.kæst/
UK /ˈoʊ.vɚ.kæst/
1.

u ám

with clouds in the sky and therefore not bright and sunny:

:
The sky/weather was overcast.
1.

u ám

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

:
Thick clouds overcast the sky.