HyperDic

English > 1 sense of the expression cloud up:
VERBweathercloud up, overcloud, cloud overbecome covered with clouds
English > cloud up: 1 sense > verb 1, weather
MeaningBecome covered with clouds.
PatternSomething ----s; It is ----ing
Synonymsovercloud, cloud over
BroaderdarkenBecome dark or darker
See alsocloudmake overcast or cloudy