Definitions

1. adjective

covered or shaded from the sun by clouds or cloudiness

“The overcast sky made it difficult to take a sunny photo.”

2. noun

a period of weather in which the sky is covered or shaded from the sun by clouds or cloudiness

“The forecast said there would be an overcast all day.”

3. verb

to cover or shade from the sun by clouds or cloudiness

“The cloud overcast the sun, making it harder to see.”