What is Disinterested?

Legal Definition
Not concerned, in respect to possible gain or loss, in the result of the pending proceedings; impartial, not biased or prejudiced. Chase v. Rutland, 47 Vt. 393 ; In re Big Run, 137 Pa. 590, 20 Atl. 711; McGilvery v. Staples, 81 Me. 101, 16 Atl. 404; Wolcott v. Ely, 2 Allen (Mass.) 340; Hickerson v. Insurance Co., 96 Tenn. 193, 33 S. W. 1041, 32 L. R. A. 172. See Disinterested witness.
-- Black's Law Dictionary