from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An extremely dense, vertically developed cumulus with a low dark base and fluffy masses that extend to great heights, usually producing heavy rains, thunderstorms, or hailstorms.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A cloud, with a tall structure and a flat base, that is often associated with thunderstorms.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a dark cloud of great vertical extent charged with electricity; associated with thunderstorms


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin cumulus ("amass") + nimbus ("cloud").


    Sorry, no example sentences found.


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