• Passe-partout

    Origin

    French

    Full definition of passe-partout

    Noun

    passe-partout

    (plural passe-partouts)
    1. (obsolete) That by which one can pass anywhere; a safe-conduct.
    2. (obsolete) A master key; a latchkey.
    3. (obsolete) A light picture frame or mat of cardboard, wood, etc., usually put between the picture and the glass, and sometimes serving for several pictures.
    ----
    © Wiktionary