decklePronunciation: /ˈdɛk(ə)l/Definition of deckle noun (also deckle strap) a device in a papermaking machine for limiting the size of the sheet, consisting of a continuous belt on either side of the wire. a frame on the mould used to shape the pulp when making paper by hand. Origin: mid 18th century: from German Deckel, diminutive of Decke 'covering'deckle in other Oxford dictionaries Definition of deckle in the US English dictionary