trillion
adjective
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one million million in the United States
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one quintillion in Great Britain
noun
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the number that is represented as a one followed by 12 zeros“in England they call a trillion a billion”billion
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the number that is represented as a one followed by 18 zeros“in England they call a quintillion a trillion”one million million millionquintillion
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a very large indefinite number, usually hyperbole“Bill Gates has about a trillion dollars.”zillion