mega Meaning in the Cambridge English Dictionary
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Meaning of “mega” in the English Dictionary

"mega" in British English

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megaadjective

uk   us   /ˈme.ɡə/ slang
very good or very ​big: She's got a mega ​voice.

mega-prefix

uk   us   /meɡ.ə-/

mega prefix (NUMBER)

science 1,000,000 ​times the ​statedunit: a ​megawatt a ​megabyte

mega prefix (BIG/GOOD)

informal large in ​amount or ​size: He's mega-rich.
(Definition of mega from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mega-" in American English

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mega-prefix

 us   /ˈmeɡ·ə/
used to ​add the ​meaning "​extremelybig" or "a ​largeamount" to ​nouns: His last ​movie made him a megastar. They’re making megabucks (= a lot of ​money).
(Definition of mega- from the Cambridge Academic Content Dictionary © Cambridge University Press)

"mega-" in Business English

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mega-prefix

uk   us   /meɡə-/
MEASURES used before nouns to ​mean one million
used before adjectives and nouns to ​mean "very" or "very ​big": mega-rich ​bankers

megaadjective [usually before noun]

uk   us   /ˈmeɡə/
informal extremely large or important: It is now likely that eight Las Vegas-style mega ​casinos will go ​ahead. mega ​mergers/​deals/​contracts
(Definition of mega- from the Cambridge Business English Dictionary © Cambridge University Press)
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