Meanings
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1
adj
self-styled or self-proclaimed, often with the implication that the claim is doubtful or pretentious
The soi-disant expert could not answer a basic technical question.
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2
adj
claimed to have a particular character or status but not genuinely possessing it
The memoir exposed the club's soi-disant sophistication as mere snobbery.
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3
adv
rare: supposedly or according to one's own claim
He was soi-disant qualified to advise the committee.
Thesaurus
Etymology
Borrowed from French soi-disant, literally 'saying oneself,' from soi, 'oneself,' + disant, the present participle of dire, 'to say.' English uses it chiefly with skeptical or mocking force for a status someone claims without convincing others.