To separate the grain from the straw or husks (chaff) by mechanical beating, with a flail or machinery, or by driving animals over them.
To be so separated, or to be capable of being so separated.
To beat soundly, usually with some tool such as a stick or whip; to drub.
To violently toss the limbs about.
(quote-book)
To belabor; to over repeatedly, especially an argument.
To drive through adverse conditions (wind, waves).
(alt form)