To make dim or indistinct
Tuesday dawned a dreary overcast day.
It was frosty and the air was sharp, but toward evening the sky became overcast and it began to thaw.
The day was overcast and absent the warming glow of the sun, felt colder than usual.
It was overcast, but warm.
The sky is almost constantly overcast, and rain falls, mostly in a drizzle and in frequent showers, on about 250 days in the year.