Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: a number equal to 1 followed by 30 zeros — see Table of Numbers
: a number equal to 1 followed by 54 zeros — see Table of Numbers
1690, in the meaning defined above
French, from Latin nonus ninth + French -illion (as in million) — more at noon
Keep scrolling for more
Resources for nonillion
Time Traveler for nonillion
See more words from the same year
More from Merriam-Webster on nonillion
See words that rhyme with nonillion
Comments on nonillion
What made you want to look up nonillion? Please tell us where you read or heard it (including the quote, if possible).
a trusted follower
Get Word of the Day daily email!
Difficult Vocab Quiz
Can you spell these 10 commonly misspelled words?
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 11/16/2018
This is just to say / Don't confuse them
What exactly is the 'it' being sufficed?
Taking a usage peeve to task
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Another round of challenging vocab!
(Secret October WOTD Quiz)
A game of winding words.