cloudy sky; overcast sky; cloudy weather
Refers to a sky covered with clouds; often used in weather descriptions or literary contexts.
It's cloudy today and looks like rain.
The sports day was held under an overcast sky.
曇天 means overcast, cloudy weather, the direct opposite of 晴天's clear skies.
曇天 describes overcast, cloudy weather, the direct opposite of the cloudless sky of 快晴.
Compound of 曇 (cloudiness) and 天 (sky, heavens). The reading どんてん is the on'yomi of both characters.