from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • suffix Combined with Latin prefixes for names of integers in order to form names of powers of a million or of a thousand greater than 1,000,000. Thus we have the names billion, trillion, etc.
  • suffix Added to various nonsense syllables to indicate an arbitrarily very large number.


from Wiktionary, Creative Commons Attribution/Share-Alike License

Back-formation from million, billion, trillion, quadrillion , each from French


Help support Wordnik (and make this page ad-free) by adopting the word -illion.


  • That's total present value, not benefits per year—oh, and that's an -illion with an "m," which is not normally how things work out in President Obama's Washington.

    Lisa Jackson's Power Play 2011


Log in or sign up to get involved in the conversation. It's quick and easy.