The term "flushed" can have several different meanings depending on its context.
1) In a physical sense, it could refer to having red cheeks or face due to increased blood flow in that area. For example, one might say they were flushed with embarrassment after making a mistake.
2) It can also be used figuratively to describe feeling excited, happy or elated. For instance, someone may say "I feel so flushed with success!" after achieving something great.
3) In the context of water closet, it means to have discharged waste from one's body through the act of defecation or urination. After using the bathroom, a person might say they had a successful flush and everything went down smoothly.