v.1. To rid the inside of something of dirt, rubbish, or impurities: The zookeepers clean out the cages once a day. I cleaned the pan out with a scrub brush.
2. To empty some area of contents or occupants: The looters cleaned out the house. The comedian's bad jokes cleaned the place out.
3. Slang To drive or force out someone or some group: The police were determined to clean out the gangs. When the cowboys became too rowdy, the bartender picked up his shotgun and cleaned them out.
4. Slang To leave someone or something completely without money or material wealth: The robbery cleaned us out. The stock market crash cleaned out even careful investors.
5. Slang To deplete or use up all of some resource or supply: The thieves stole my bank card and cleaned out my account. Emergency supplies were already low, and the hurricane cleaned them out.