- Noun. A person considered alone, rather than as belonging to a group of people.
- Noun. (context, Legal) A single physical human being as a legal subject, as opposed to a legal person such as a corporation.
- Noun. An object, be it a thing or an agent, as contrasted to a class.
- Adjective. Relating to a single person or thing as opposed to more than one.
- Adjective. Intended for a single person as opposed to more than one person.