Definitions

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

  • n. Informal An indeterminately huge number.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An unspecified large number (of).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. very large indeterminate number
  • n. a very large indefinite number (usually hyperbole)

Etymologies

On the model of million, billion, etc.
(American Heritage® Dictionary of the English Language, Fourth Edition)
See +‎ -illion (Wiktionary)

Examples

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