billion

[ bil-yuh n ]
/ ˈbɪl yən /

noun, plural bil·lions, (as after a numeral) bil·lion.

a cardinal number represented in the U.S. by 1 followed by 9 zeros, and in Great Britain by 1 followed by 12 zeros.
a very large number: I've told you so billions of times.

adjective

equal in number to a billion.

Origin of billion

1680–90; < French, equivalent to b(i)- bi-1 + -illion, as in million

Related forms

bil·lionth, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for billionth

British Dictionary definitions for billionth

billion

/ (ˈbɪljən) /

noun plural -lions or -lion

one thousand million: it is written as 1 000 000 000 or 10 9
(formerly, in Britain) one million million: it is written as 1 000 000 000 000 or 10 12
(often plural) any exceptionally large number

determiner

(preceded by a or a cardinal number)
  1. amounting to a billionit seems like a billion years ago
  2. (as pronoun)we have a billion here

Derived Forms

billionth, adjective, noun

Word Origin for billion

C17: from French, from bi- 1 + -llion as in 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