billet-doux
noun /ˌbɪleɪ ˈduː/
/ˌbɪleɪ ˈduː/
(plural billets-doux
(from French, humorous or literary) /ˌbɪleɪ ˈduːz/
/ˌbɪleɪ ˈduːz/
)- a love letterWord Originlate 17th cent.: French, literally ‘sweet note’.
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