[ spil-oh-ver ]
/ ˈspɪlˌoʊ vər /
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the act of spilling over.
a quantity of something spilled over; overflow.
Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

Origin of spillover

First recorded in 1940–45; noun use of verb phrase spill over
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use spillover in a sentence

British Dictionary definitions for spillover

spill over

(intr, adverb) to overflow or be forced out of an area, container, etc
noun spillover
mainly US and Canadian the act of spilling over
mainly US and Canadian the excess part of something
economics any indirect effect of public expenditure
astronomy the part of the noise associated with a radio telescope using a dish antenna caused by pick-up by a secondary antenna from directions that do not intercept the dish
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012