I often see words like: nonfinity, and nofinity.

Mostly on T-shirts or on signs.

Are all these words antonyms of the word infinity?


One actual antonym of "infinity" is "finity" - although I've never actually seen "finity" used anywhere. "Boundedness" and "finiteness" are more typical antonyms that I've seen - although perhaps mathematicians would use "finity".

"Nonfinity" and "nofinity" are slang - I haven't seen them before. I would actually interpret them as synonyms of "infinity", though that may be incorrect.

Here's why: the prefix "in" means "no" or "not" - something that is "indivisible" cannot be divided. So the "in" in "infinity" is negating "finity". In "nonfinity" and "nofinity", the "non" and "no" prefixes are also negating "finity".

So that's why I would assume that "nonfinity" and "nofinity" are synonyms of "infinity". But again, that may not be accurate; one of the downsides of coining a new word is that its meaning may be non-obvious. ;)

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  • 2
    Clearly, the antonym of infinity should be outfinity. – J.R. Mar 3 '17 at 19:47
  • But if infinity means no finity then does finity really mean the opposite of infinity? – SovereignSun Mar 4 '17 at 8:59
  • infinity does not mean "no finity"; infinite means "not finite", and infinity is derived as a noun form of infinite. – J.R. Mar 4 '17 at 10:54

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