to beat out grain from, as straw or husks; to beat the straw or husk of (grain) with a flail; to beat off, as the kernels of grain; as, to thrash wheat, rye, or oats; to thrash over the old straw.-to beat soundly, as with a stick or whip; to drub.-to practice thrashing grain or the like; to perform the business of beating grain from straw; as, a man who thrashes well.-hence, to labor; to toil; also, to move violently.-same as thrash.