Thundercloud

noun

Definitions

Noun
  1. 1
    A large, dark cloud, usually a cumulonimbus, charged with electricity and producing thunder and lightning.
  2. 2
    a dark cloud of great vertical extent charged with electricity; associated with thunderstorms wordnet
  3. 3
    Something menacing and brooding. broadly, figuratively

    "the ominous thunderclouds of war"

Etymology

From thunder + cloud.

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