billet-doux
noun [C] /ˌbɪl.eɪˈduː/ (plural billets-doux /ˌbɪl.eɪˈduː/ ) literaryDefinition
› a love letterLetters, notes and cardsPaper and stationery
(Definition of billet-doux noun from the Cambridge Advanced Learner's Dictionary & Thesaurus
© Cambridge University Press)
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