Billion

n.

1.

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

Noun	1.	billion - the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen Synonyms: 1000000000000, one million million
	2.	billion - the number that is represented as a one followed by 9 zeros Synonyms: 1000000000, one thousand million
Adj.	1.	billion - denoting a quantity consisting of one thousand million items or units in the United States Synonyms: a billion
	2.	billion - denoting a quantity consisting of one million million items or units in Great Britain Synonyms: a billion

a billion, a crore, a lakh, a million, a myriad, a nonillion, a quadrillion, a thousand, a zillion, astronomical number, googol, googolplex, infinitude, infinity, jillion, large number, milliard, trillion, zillion