Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The cardinal number equal to 1030.
  • noun Chiefly British The cardinal number equal to 1054.

from The Century Dictionary.

  • noun The number produced by involving a million to the ninth power, denoted by unity with fifty-four ciphers annexed; or, according to the French and American system of numeration, the number denoted by unity with thirty ciphers annexed.

from the GNU version of the Collaborative International Dictionary of English.

  • noun According to the French and American notation, a thousand octillions, or a unit with thirty ciphers annexed; according to the English notation, a million octillions, or a unit with fifty-four ciphers annexed. See the Note under numeration.

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

  • noun US 1030.
  • noun 1054.
  • noun hyperbolic An unspecified very large number.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French : Latin nōnus, ninth; see nona– + French million, million (from Old French milion; see million).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

non- (“nine”) + -illion

Examples

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