[thrum] n [ME, fr. OE -thrum (in tungethrum ligament of the tongue); akin to OHG drum fragment] (14c) 1 a (1): a fringe of warp threads left on the loom after the cloth has been removed (2): one of these warp threads b: a tuft or short piece of rope yarn used in thrumming canvas--usu. used in pl. c: bit, particle
2: a hair, fiber, or threadlike leaf on a plant; also: a tuft or fringe of such structures -- thrum adj
[2]thrum vt thrummed ; thrum.ming (15c) 1: to furnish with thrums: fringe
2: to insert short pieces of rope yarn or spun yarn in (a piece of canvas) to make a rough surface or a mat which can be wrapped about rigging to prevent chafing [3]thrum vb thrummed ; thrum.ming [imit.] vi (1592) 1: to play or pluck a stringed instrument idly: strum
2: to sound with a monotonous hum ~ vt 1: to play (as a stringed instrument) in an idle or relaxed manner
2: to recite tiresomely or monotonously [4]thrum n (1798): the monotonous sound of thrumming