quadrillion

  1. Cardinal number.  (US, modern British and Australian) A thousand trillion: 1 followed by fifteen zeros, 1015.
  2. Cardinal number.  (dated, UK) A million trillion: 1 followed by twenty-four zeros, 1024.
  3. Noun.  (figuratively, slang) Any very large number, exceeding normal description.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.