Profit, benefit, or advantage resulting from a contract, or the ownership of an estate as distinct from the legal ownership or control.
That right which a person has in a contract made with another; as if A makes a contract with B that he will pay C a certain sum of money, B has the legal interest in the contract, and C the beneficial interest. Hamm. on Part. 6, 7, 25 2 Bulst. 70.