Passe-partout
Origin
French
Full definition of passe-partout
Noun
passe-partout
(plural passe-partouts)- (obsolete) That by which one can pass anywhere; a safe-conduct.
- (obsolete) A master key; a latchkey.
- (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.