Billion

[Sarah]

According to the French and American method of numeration, athousand millions, or 1,000,000,000; according to the English method,a million millions, or 1,000,000,000,000. See Numeration.

[Sarah]

A number whose value varies with geography: for example, in the U.S., it is a thousand million (1,000,000,000); in the U.K., it is a million million (1,000,000,000,000).

[Sarah]

I believe in the UK a billion means a million millions (e.g. 10^12 rather than 10^9)

[Sarah]

America and most other non-british-colonized countries (let's not debate about that): 1,000,000,000
: 1 thousand Million

Australia, The Uk etc. : 1,000,000,000,000
: 1 Million Million

[Cami]

The number equivalent to the product of a thousand and a million; 1,000,000,000 or 10⁹