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1. To clean the inside of something by sweeping: I swept out the garage. No one goes in that room except for the janitor, who sweeps it out every week.
2. To cause something to be carried outward by some current: The abandoned surfboard was swept out to sea. A gust of wind swept the leaves out of the gutter and into the air.
3. To cause someone to be removed from office or power, especially in a decisive election. Used chiefly in the passive: The politician was swept out of office because the citizens had lost faith in the government.