Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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clean slate an honorable record. [2 definitions]
clean up one's act (informal) to improve one's performance or behavior.
come clean (informal) to admit the truth.
dry-clean to clean using chemicals other than water.
vacuum cleaner an electrical appliance that cleans floors, carpets, rugs, and upholstery by means of suction.