rub (someone or something) hard so as to clean them, typically with a brush and water

he had to scrub the floor

she was scrubbing herself down at the sink

she scrubbed furiously at the plates

cancel or abandon (something)

the first two races had to be scrubbed because of blustery winds and rough seas

use water to remove impurities from (gas or vapour)

the vapour is scrubbed by the condensate

(of a driver) allow (a tyre) to slide or scrape across the road surface so as to reduce speed

I usually only scrub the front tyre when I get into a turn too hot

(of a rider) rub the arms and legs urgently on a horse's neck and flanks to urge it to move faster

by now the field was spreadeagled and scrubbing to keep in touch with the hounds