anything broad and limber that hangs loose, or that is attached by one side or end and is easily moved; as, the flap of a garment.-a hinged leaf, as of a table or shutter.-the motion of anything broad and loose, or a stroke or sound made with it; as, the flap of a sail or of a wing.-a disease in the lips of horses.-to beat with a flap; to strike.-to move, as something broad and flaplike; as, to flap the wings; to let fall, as the brim of a hat.-to move as do wings, or as something broad or loose; to fly with wings beating the air.-to fall and hang like a flap, as the brim of a hat, or other broad thing.