[ zil-yuhn ]
See synonyms for: zillionzillions on Thesaurus.com

noun,plural zil·lions, (as after a numeral) zil·lion.
  1. an extremely large, indeterminate number.

  1. of, relating to, or amounting to a zillion.

Origin of zillion

First recorded in 1930–35; jocular alteration of million, billion, etc.

Words Nearby zillion

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How to use zillion in a sentence

British Dictionary definitions for zillion


/ (ˈzɪljən) informal /

nounplural -lions or -lion
  1. (often plural) an extremely large but unspecified number, quantity, or amount: zillions of flies in this camp

    • amounting to a zillion: a zillion different problems

    • (as pronoun): I found a zillion under the sink

Origin of zillion

C20: on the model of million

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012