Legal personality
The legal form that one takes. One might be a natural person, or a corporation of some kind - to flesh and blood, a shoddy fiction, but in the eyes of the law a very real, very worthwhile contrivance, deserving of the full protection of the constitution.
Corporations - companies, if you like - come in all sorts of shapes and sizes. LLCs, PLCs, société anonymes, société d’investissement à capital variable, segregated portfolio companies, incorporated cell companies, and the many and splendoured varieties of espievie, common and exotic, that you can find out there - shall I go on?
then there are in-betweeners like partnerships, trusts, funds and segregated portfolios having some or none of the characteristics of legal personality.
Be assured a world of fun awaits you. Come on in.