refers to the person (or thing) that is a subject or object; person can be either first (I, me, my, mine), second (you, your), or third (he, she, him, her, it, they).

a child in age according to the inner man, who has in him the power to grow ( crescere ) and to be led onward ( succedentibus incrementis pervenire ) to the age of youth

a man considered according to the rank he holds in society, with all the rights to which the place he holds entitles him, and the duties which it imposes

an accused if charges have been preferred against him or her

a SDM of the church only in the area assigned to him or her

a single organism, and you can't arbitrarily draw boundaries that chop him up

a slave of somebody only if he lives his whole life rendering service and obedience to him and behaves as one should behave to his master

a subject who is capable of having his actions imputed to him

a substantial shareholder in a public company if he holds himself or by his nominee, shares in the company which entitle him to exercise at least ten per cent of the unrestricted voting rights at any general meeting of the company