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ENGLISH · A WORD WITH POSSIBILITIES

spillover.

That which overflows; the excess or side effect.

9 characters3 syllables approx.English language

Meaning & usage

noun/ˈspɪlˌəʊ̯.və/Received-Pronunciation/ˈspɪlˌaʊæː/Northumbria/ˈspɪlˌoː.və/Wales/ˈspɪlˌəʉ̯.və/Australia
  1. That which overflows; the excess or side effect.

    countable · uncountable
    The spillover from the dam due to the heavy rains will run down this channel and harmlessly dump into that river, we hope.
    The spillover from this war will be many little massacres of civilians by civilians.
  2. The spread of infectious disease between different species of animal and particularly to humans.

    countable · uncountable
Where this word comes from

From spill + over.

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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.