A single person is someone who is not in a relationship or is unmarried.
In common usage, the term 'single' is often used to refer to someone who is not involved in any type of serious romantic relationship, including long-term dating, engagement, marriage, or someone who is 'single by choice'.
Single people may participate in dating and other activities to find a long-term partner or spouse.
People may remain single for a variety of reasons, including financial and emotional or physical health issues, stress in the family, time constraints, education, career, personal preferences, advanced age or social fears, living in a society or locality where there are an insufficient number of people of the preferred sex for romantic or sexual attraction, or simply extreme bad luck with finding anyone who will reciprocate an interest in a relationship. In some cases, single people may be uninterested in marriage, domestic partnership, or other types of committed relationships.
