a heavy mallet, used to drive wedges, beat pavements, etc.-a machine in which fabrics are subjected to a hammering process while passing over rollers, as in cotton mills; -- called also beetling machine.-to beat with a heavy mallet.-to finish by subjecting to a hammering process in a beetle or beetling machine; as, to beetle cotton goods.-any insect of the order coleoptera, having four wings, the outer pair being stiff cases for covering the others when they are folded up. see coleoptera.-to extend over and beyond the base or support; to overhang; to jut.