noun 1. the act of cleaning or polishing a surface by washing and rubbing, as with an abrasive cloth ⇒ Who wants to spend time on cleaning and scouring?, ⇒ The rubber moulding needed a good scouring., ⇒ She paused from her incessant scrubbing and scouring. 2. the process of clearing a channel by the force of water ⇒ The number of high-flow days each spring doubled, resulting in increased scouring of the stream channel. 3. an instance of causing livestock to purge their bowels ⇒ The hair on his back legs was blistered off from all the scouring., ⇒ Plants grown in saline soil might accumulate enough salt to cause scouring of animals who eat too much.
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