Passe-partout

(păs-par-tōō'). [Fr., from passer, to pass, and partout, every where.] 1. That by which one can pass any where; any thing which serves a turn or exigency. 2. Specifically, a master-key; a latch-key. 3. A light picture-frame of card-board easily altered and adjusted; a border serving for several pictures.