Definition of attaché
1 : a technical expert on a country's diplomatic staff at a foreign capital a military attaché
2 : attaché case
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Origin and Etymology of attaché
French, past participle of attacher
First Known Use: 1822
ATTACHÉ Defined for English Language Learners
attaché
playDefinition of attaché for English Language Learners
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: a person who works at an embassy as an expert on a particular subject
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See words that rhyme with attaché Spanish Central: Translation of attaché Britannica.com: Encyclopedia article about attaché
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