Topic
billion.
number name for 1000 million or one million million depending on the scale used
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About billion
Billion is a word for a large number with two distinct definitions:1,000,000,000, i.e. one thousand million, or 109, as defined on the short scale. This is now the most common sense of the word in all varieties of English; it has long been established in American English and has since become common in Britain and other English-speaking countries as well.
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