A person is a man, woman, or child.

Persons is used as the plural of person in formal, legal, and technical writing.

If you talk about someone as a person, you are considering them from the point of view of their real nature.

Your person is your body.

In grammar, we use the term first person when referring to 'I' and 'we', second person when referring to 'you', and third person when referring to 'he', 'she', 'it', 'they', and all other noun groups. Person is also used like this when referring to the verb forms that go with these pronouns and noun groups.

If you do something in person, you do it yourself rather than letting someone else do it for you.

If you meet, hear, or see someone in person, you are in the same place as them, rather than, for example, speaking to them on the telephone, writing to them, or seeing them on television.