fi·​bril·​late | \ ˈfi-brə-ˌlāt How to pronounce fibrillate (audio) , ˈfī- \
fibrillated; fibrillating

Definition of fibrillate

intransitive verb

: to undergo or exhibit fibrillation

transitive verb

: to cause to undergo fibrillation

Examples of fibrillate in a Sentence

Recent Examples on the Web Extreme temperature changes will cause the hearts of rabbits, but not those of alligators, to fibrillate. Rafil Kroll-zaidi, Harper's Magazine, 27 Apr. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fibrillate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of fibrillate

circa 1847, in the meaning defined at intransitive sense

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The first known use of fibrillate was circa 1847

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Dictionary Entries Near fibrillate

fibrillar theory



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Cite this Entry

“Fibrillate.” Dictionary, Merriam-Webster, Accessed 28 Oct. 2021.

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More Definitions for fibrillate


fi·​bril·​late | \ ˈfib-rə-ˌlāt How to pronounce fibrillate (audio) , ˈfīb- How to pronounce fibrillate (audio) \
fibrillated; fibrillating

Medical Definition of fibrillate

intransitive verb

: to undergo or exhibit fibrillation

transitive verb

: to cause (as the heart) to undergo fibrillation

More from Merriam-Webster on fibrillate

Nglish: Translation of fibrillate for Spanish Speakers


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