What is Artificial?

Legal Definition
What is the result of, or relates to, the arts; opposed to natural; thus we say a corporation is an artificial person, in opposition to a natural person. Artificial accession is the uniting one property to another by art, opposed to a simple natural union. 1 Bouv. Inst. n. 503.
-- Bouviers Law Dictionary
Legal Definition
Created by art or by law; existing only by force of or in contemplation of law.
See also
-- Black's Law Dictionary
Legal Definition
Having an existence presumed in law only, as a corporation.
-- Ballentine's Law Dictionary