cloud up


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Related to cloud up: cloud over, cloudiness

cloud up

 
1. Lit. [for the sky] to get cloudy, as if it were going to rain. All of a sudden it clouded up and began to rain. It usually clouds up at the top of the mountain.
2. Fig. [for someone] to grow very sad, as if to cry. Whenever Mary got homesick, she'd cloud up. She really wanted to go home.
See also: cloud, up