noun, often attributive
cen·​til·​lion | \ sen-ˈtil-yən How to pronounce centillion (audio) \

Definition of centillion

US : a number equal to 1 followed by 303 zeros — see Table of Numbers also, British : a number equal to 1 followed by 600 zeros — see Table of Numbers

First Known Use of centillion

1852, in the meaning defined above

History and Etymology for centillion

Latin centum + English -illion (as in million)

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Time Traveler for centillion

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The first known use of centillion was in 1852

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Cite this Entry

“Centillion.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/centillion. Accessed 24 January 2020.

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a feeling of well-being or elation

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