Cleat (klēt), n. [OE. clete wedge; cf. D. kloot ball, Ger. kloss, klotz, lump, clod, MHG. klōz lump, ball, wedge, OHG. chlōz ball, round mass.]
1. (Carp.) A strip of wood or iron fastened on transversely to something in order to give strength, prevent warping, hold position, etc.
2. (Naut.) A device made of wood or metal, having two arms, around which turns may be taken with a line or rope so as to hold securely and yet be readily released. It is bolted by the middle to a deck or mast, etc., or it may be lashed to a rope.