LekhoriLekhoriThat by which one can pass anywhere; a safe-conduct.
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.
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.
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