seasonality

[see-zuh-nal-i-tee]

noun

plural

seasonalities 

1. the state or quality of being seasonal or dependent on the seasons.

   the seasonality of Halloween costumes.

2. Usually seasonalities a pattern, variation, or fluctuation that is correlated with a season, day of the week, or other period of time.

   a study of birth seasonalities;

   You get higher returns in January because of seasonalities in stock prices.

Word History and Origins

Origin of seasonality¹

First recorded in 1900–05; seasonal ( def. ) + -ity ( def. )

Example Sentences

He points to favorable seasonality in the stock market and to the Fed’s continued monetary easing as key tailwinds that could keep the rally going.

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Positive year-end seasonality in the U.S.

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Treasury seasonality initially appeared to fail this additional step.

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After that, however, citing “seasonality,” they plan to pause the production quota increases during the first three months of 2026.

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OPEC+ attributed the pause to seasonality, and said the group maintained “full flexibility to continue pausing or reverse the additional voluntary production adjustments.”

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