billion

  1. Cardinal number.  (US, modern British & Australian) A milliard, a thousand million: 1 followed by nine zeros, 109.
  2. Cardinal number.  (context, obsolete British & Australian) A million million: a 1 followed by twelve zeros, 1012.
  3. Cardinal number.  (context, colloquial) A very large number.

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