Word Study
billet-doux
CIDE DICTIONARY
billet-doux, n. [F. billet note + doux sweet, L. dulcis.].
A love letter or note. [1913 Webster]
"A lover chanting out a billet-doux." [1913 Webster]
OXFORD DICTIONARY
billet-doux, n. (pl. billets-doux) often joc. a love-letter.
Etymology
F, = sweet note
ROGET THESAURUS
billet-doux
Correspondence
N correspondence, letter, epistle, note, billet, post card, missive, circular, favor, billet-doux, chit, chitty, letter card, picture post card, postal, card, despatch, dispatch, bulletin, these presents, rescript, rescription, post, epistolary, furor scribendi.Endearment
N endearment, caress, blandishment, blandiment, panchement, fondling, billing and cooing, dalliance, necking, petting, sporting, sparking, hanky-panky, caressing, embrace, salute, kiss, buss, smack, osculation, deosculation, amorous glances, courtship, wooing, suit, addresses, the soft impeachment, lovemaking, serenading, caterwauling, flirting, flirtation, gallantry, coquetry, true lover's knot, plighted love, love tale, love token, love letter, billet-doux, valentine, honeymoon, Strephon and Chloe, caressing, sighing like furnace, love-sick, spoony, caressed, faint heart neer won fair lady, kisses honeyed by oblivion.For further exploring for "billet-doux" in Webster Dictionary Online