A variety of definitions can be offered from a human being to a legal organization with rights. In biblical reference, it is generically an individual who, when conscious and grown, is capable of free choice. In reference to the Trinity as three persons, the word refers to the attributes of personhood: self-awareness, choice, can reason, love, possessing a will and consciousness, etc. Humans possess these attributes as well.

So, here is the definition of person used by CARM.

A person is a set of characteristics that encompass identity, self-awareness, awareness of others, emotions, self-determination, and a rational nature. Personhood is the condition shared by God, angels, and people that involves the ability to think, speak, be self-aware, aware of others, can love, be rational, etc. Both God and angels are non-corporeal yet exhibit the characteristics of personhood. Therefore, the word ‘person’ deals with that set of characteristics and is not restricted to just human beings in physical form.