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Passe-partout

noun

Noun

1
That by which one can pass anywhere; a safe-conduct.
2
a mounting for a picture using gummed tape wordnet
3
A master key.
"The traditional (or modern) way of confronting complexity was to find a secure point of reference that could serve as foundation, a passe-partout, a master key from which everything else could be derived."
4
key that secures entrance everywhere wordnet
5
A light picture frame or mat of cardboard, wood, etc., usually put between the picture and the glass, and sometimes serving for several pictures.
"A new introduction for use in conjunction with passe-partout framing is a series of corner pieces which are readily folded round the corners of the finished passe-partout, giving it a certain added effect and slight embellishment."

From French passe-partout.

Unscramble this word: passepartout