Before revision: In common usage, the term single is often used to refer to someone who is not involved in either any type of sexual relationship, romantic relationship, including long-term dating, engagement, marriage, or someone who is "single by choice".
After revision: In common usage, the term single is often used to refer to someone who is not involved in any type of sexual relationship, romantic relationship, including long-term dating, engagement, marriage, or someone who is "single by choice".