In this English phrasal verbs lesson, learn how to use "clean, clean up, clean out and clean up after". "Clean" and "clean up" have the same meaning. They're used to talk about removing dirt and organizing a specific space, such as a bedroom, bathroom, kitchen or office. When we turn "clean" into "clean up" and make it a phrasal verb the meaning doesn't change. You can use them interchangeably. "Clean out" has a different meaning from "clean (up)". "Clean out" is used when you remove all the ite