to rub hard; to wash with rubbing; usually, to rub with a wet brush, or with something coarse or rough, for the purpose of cleaning or brightening; as, to scrub a floor, a doorplate.-to rub anything hard, especially with a wet brush; to scour; hence, to be diligent and penurious; as, to scrub hard for a living.-one who labors hard and lives meanly; a mean fellow.-something small and mean.-a worn-out brush.-a thicket or jungle, often specified by the name of the prevailing plant; as, oak scrub, palmetto scrub, etc.-one of the common live stock of a region of no particular breed or not of pure breed, esp. when inferior in size, etc.-mean; dirty; contemptible; scrubby.