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cumulus.

A heap or mound.

7 characters3 syllables approx.English language

Meaning & usage

noun/ˈkjuːmjʊləs/Received-Pronunciation/ˈkjumjələs/General-American
  1. A heap or mound.

  2. A large white, puffy cloud that develops through convection.

Where this word comes from

Etymology tree Proto-Indo-European *ḱewh₁- Proto-Indo-European *ḱuh₁mósder.? Latin cumulusbor. English cumulus Learned borrowing from Latin cumulus. Doublet of comble. Sense 2 (“type of cloud”) was coined by the British chemist and amateur meteorologist Luke Howard (1772–1864): see the 1803 quotation.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.