What does "billion" mean?

the number that is represented as a one followed by 9 zeros

What is a synonym for "billion"?

Common synonyms include: milliard, 1000000000, 1000000000000, a billion, a crore, a lakh.

//ˈbɪljən// num, slang

num, slang ·Common ·High school level

Noun

1
the number that is represented as a one followed by 9 zeros wordnet
2
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 wordnet
3
a very large indefinite number (usually hyperbole) wordnet

Adjective

1
denoting a quantity consisting of one thousand million items or units in the United States wordnet
2
denoting a quantity consisting of one million million items or units in Great Britain wordnet

Numeral

1
Either of two large amounts:; a thousand million (logic: 1,000 × 1,000²): 1 followed by nine zeros, 10⁹. US
"At the last assessment it [the national debt] amounts to seven billion pounds (£7,000,000,000)."
2
Either of two large amounts:; A million (times a) million (logic: 1,000,000²): a 1 followed by twelve zeros (10¹²); a thousand milliard. dated
"n = 1,000,000,000,000, that is, = a billion, or the square of a million"
3
An unspecified very large number. colloquial, excessive
"Near-synonyms: gazillion; see also Thesaurus:zillion"