Found 2 items, similar to thundercloud.
English → English (WordNet) Definition: thundercloud thundercloud n : a dark cloud of great vertical extent charged with electricity; associated with thunderstorms [syn: cumulonimbus, cumulonimbus cloud]
English → English (gcide) Definition: Thundercloud Thundercloud \Thun"der*cloud`\, n. A cloud charged with electricity, and producing lightning and thunder. [1913 Webster] [1913 Webster]