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Meaning of “billion” in the English Dictionary

"billion" in British English

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billionnoun [C]

uk   /ˈbɪl.jən/  us   /ˈbɪl.jən/
B2 the number 1,000,000,000: The population of China is over a/one billion. Cosmetics is a billion-dollar industry. The government has invested billions of dollars in the project.
UK old-fashioned 1,000,000,000,000 Note: This number is now called a trillion.
billions of sth informal
a very large number: There were billions of flies everywhere.

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(Definition of billion from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"billion" in American English

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billionnumber

 us   /ˈbɪl·jən/
1,000,000,000: Congress cut spending by $255 billion. Four hurricanes battered Florida, causing billions of dollars in damage.
(Definition of billion from the Cambridge Academic Content Dictionary © Cambridge University Press)

"billion" in Business English

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billionnoun [C]

uk   us   /ˈbɪljən/ (written abbreviation UK bn, written abbreviation US b, written abbreviation bil)
one thousand million: 1,000,000,000: a loss of £2 billion The banks lost billions in the crash.
(Definition of billion from the Cambridge Business English Dictionary © Cambridge University Press)
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