vigintillion

noun, often attributive vi·gin·til·lion \ ˌvī-ˌjin-ˈtil-yən \

Definition of vigintillion

US : a number equal to 1 followed by 63 zeros — see Table of Numbers; also, British : a number equal to 1 followed by 120 zeros — see Table of Numbers

Recent Examples of vigintillion from the Web

Physics theories suggest that sometime between 10^34 (1 decillion) and 10^64 (1 vigintillion) years from now, the protons found in the nuclei of all atoms will decay.

— NBC News, "How humans might outlive Earth, the sun...and even the universe," 20 Dec. 2017

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

Origin and Etymology of vigintillion

Latin viginti twenty + English -illion (as in million) — more at vigesimal

NEW! Time Traveler

First Known Use: 1857

in the meaning defined above

See Words from the same year

Learn More about vigintillion

See words that rhyme with vigintillion

Seen and Heard

What made you want to look up vigintillion? Please tell us where you read or heard it (including the quote, if possible).

show

WORD OF THE DAY

declivity

play

a downward inclination or slope

BROWSE DICTIONARY

vigil light

vigintennial

vigintillion

Vigna

vigneron

Test Your Vocabulary

Obscure Shapes

Something that is ooid is shaped like:

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Words at Play

Ask the Editors

Word Games