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TOEFL BNC: 6226 COCA: 8463

fluctuation

noun

fluc·​tu·​a·​tion ˌflək-chə-ˈwā-shən How to pronounce fluctuation (audio)
-chü-ˈā-
plural fluctuations
: an act or instance of fluctuating : an irregular shifting back and forth or up and down in the level, strength, or value of something
Small fluctuations in prices are to be expected.
Some fluctuation in real estate values is not unusual.
North American species in general, having contended with blazing July days and frosty September nights as they evolved, are much more tolerant of temperature fluctuations than tropical species are. Jonathan Franzen
fluctuational
ˌflək-chə-ˈwā-shnəl How to pronounce fluctuation (audio)
-shə-nᵊl
-chü-ˈā-
adjective

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of fluctuation was in the 15th century

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