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.

(Definition of billion from the Cambridge Advanced Learners Dictionary & Thesaurus
© Cambridge University Press)

What is the pronunciation of billion?
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“billion”: synonyms and related words:

an imaginary creature with magic powers, usually represented as a very small person with wings

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