Definition of millionairess noun from the Oxford Advanced Learner's Dictionary

 

millionairess

 noun
noun
BrE BrE//ˌmɪljəˈneərəs//
 
; NAmE NAmE//ˌmɪljəˈnerəs//
 
(old-fashioned)
 
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a woman who is a millionaire
See the Oxford Advanced American Dictionary entry: millionairess