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Definition of billet-doux noun from the Oxford Advanced Learner's Dictionary

billet-doux

noun
 
/ˌbɪleɪ ˈduː/
 
/ˌbɪleɪ ˈduː/
(plural billets-doux
 
/ˌbɪleɪ ˈduːz/
 
/ˌbɪleɪ ˈduːz/
)
(from French, humorous or literary)
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  1. a love letter
    Word Originlate 17th cent.: French, literally ‘sweet note’.
See billet-doux in the Oxford Advanced American Dictionary
trait
noun
 
 
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