Meaning of “millionaire” in the English Dictionary

american-english dictionary

"millionaire" in British English

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millionairenoun [ C ]

uk /ˌmɪl.jəˈneər/ us /ˌmɪl.jəˈner/ female also millionairess,

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

"millionaire" in American English

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millionairenoun [ C ]

us /ˌmɪl·jəˈneər/

someone who has more than a million dollars (= $1,000,000) in property, possessions, or money saved

(Definition of “millionaire” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"millionaire" in Business English

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millionairenoun [ C ]

uk /ˌmɪljəˈneər/ us

a person who has money, property, etc. that is worth at least a million dollars, euros, pounds, etc.:

He is a self-made millionaire.
make sb/become a millionaire Her company made her a millionaire.
a dotcom/internet millionaire
a millionaire businessman/footballer/novelist

(Definition of “millionaire” from the Cambridge Business English Dictionary © Cambridge University Press)