to rub (a surface) hard, with or as if with a brush, soap, and water, in order to clean it

to remove (dirt), esp by rubbing with a brush and water

(of a surgeon) to wash the hands and arms thoroughly before operating

to purify (a vapour or gas) by removing impurities

to delete or cancel

(of jockeys) to urge a horse forwards by moving the arms and whip rhythmically forwards and backwards alongside its neck

the act of or an instance of scrubbing