Meaning of maîtresse en titre in English:

maîtresse en titre

Pronunciation /meɪˌtrɛs ɒn ˈtiːtrə/ /mɛˌtrɛs ɒn ˈtiːtrə/

noun

  • An official or acknowledged mistress.

Origin

Mid 19th century; earliest use found in William Thackeray (1811–1863), novelist. Apparently from French maîtresse en titre (although this expression is not recorded in French dictionaries) from maîtresse + en titre.