verb-intransitive. To roll, as the body of an animal; to tumble about, especially in anything foul or defiling; to wallow.verb-intransitive. To rise and fall, as waves; to tumble over, as billows.v. To wither; to wilt.adj. Of, pertaining to, or designating, the most heavily weighted race in a meeting.n. That in which any person or thing welters, or wallows; filth; mire; slough.n. A rising or falling, as of waves.