deckle /ˈdɛkəl/noun 3verb 1forms 3 noun3 •The fattier, smaller point-cut portion of a brisket of beef, being the superficial pectoral muscle. •A frame or edge which limits the pulp and, consequently, the size of the resulting paper. •A membrane covering the outermost side of a brisket of beef, where it was attached to the rib cage verb1 •(rare) To give deckles to (paper). formsdeckled · deckling · deckles