v. t. [ imp. & p. p. Pleached p. pr. & vb. n. Pleaching. ] [ Cf. OF. plaissier to bend, and also F. plisser to plait, L. plicare, plicitum, to fold, lay, or wind together. Cf. Plash to pleach. ] To unite by interweaving, as branches of trees; to plash; to interlock. “The pleached bower.” Shak. [ 1913 Webster ]