Billet-doux

//ˈbɪl.eɪ ˈdu// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A love letter.

    ""O heavenly, heavenly flowers!" exclaimed Miss Sharp, and smelt them delicately, and held them to her bosom, and cast up her eyes to the ceiling, in an ecstasy of admiration. Perhaps she just looked first into the bouquet, to see whether there was a billet-doux hidden among the flowers; but there was no letter."

Example

More examples

""O heavenly, heavenly flowers!" exclaimed Miss Sharp, and smelt them delicately, and held them to her bosom, and cast up her eyes to the ceiling, in an ecstasy of admiration. Perhaps she just looked first into the bouquet, to see whether there was a billet-doux hidden among the flowers; but there was no letter."

Etymology

Borrowed from French billet doux (literally “sweet note”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.