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Verb: cloud up
  1. Become covered with clouds
    "The sky clouded up";
    - overcloud, cloud over

Derived forms: clouds up, clouded up

Type of: darken

Nearest

cloud
cloud bank
cloud base
cloud chamber
cloud computing
cloud cover
cloud grass
cloud nine
cloud over
cloud seeder
cloud up
cloudberry
cloudburst
cloud-covered
cloud-cuckoo-land
clouded
cloudiness
clouding
clouding up
cloudless
cloudlessness