What is Beneficial?

Legal Definition
Of advantage, profit or interest; as the wife has a beneficial interest in property held by a trustee for her. Vide Cestui que trust.
-- Bouviers Law Dictionary
Legal Definition
Tending to the benefit of a person; yielding a profit, advantage or benefit; enjoying or entitled to a benefit or profit. In re Importers' Exchange (Com. PI.) 2 N. Y. Supp. 257; Regina v. Vange, 3 Adol. & El. (N. S.) 254. This term is applied bath to estates (as a "beneficial interest") and to persons, (as "the beneficial owner.")
-- Black's Law Dictionary