Meaning of “billion” in the English Dictionary

"billion" in 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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us /ˈbɪl·jən/


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 ]

/ˈbɪljən/ uk us 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)