spillover

noun

spill·​over ˈspil-ˌō-vər How to pronounce spillover (audio)
often attributive
1
: the act or an instance of spilling over
2
: a quantity that spills over
3
: an extension of something especially when an excess exists
benefiting from a spillover of prosperity from neighboring states

Examples of spillover in a Sentence

Put a pan under the pie to catch any spillovers. New technology has a positive spillover effect into countless fields.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Our ceaseless extraction of resources has destroyed ecosystems around the world, erasing boundaries between humans and wildlife, and increasing the opportunity for spillovers. Neil Vora, Time, 22 May 2026 Dana, hantavirus occurs by what's called a zoonotic spillover. Dana Taylor, USA Today, 20 May 2026 Third, watch the regional spillover risk. Jason Kirsch, Forbes.com, 20 May 2026 What tends to happen is that one person gets it from an animal — which is called a spillover — and then that individual spreads it to other people. Gabrielle Emanuel, NPR, 20 May 2026 See All Example Sentences for spillover

Word History

First Known Use

1940, in the meaning defined at sense 1

Time Traveler
The first known use of spillover was in 1940

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Cite this Entry

“Spillover.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spillover. Accessed 27 May. 2026.

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