What is Advowson In Gross?

Legal Definition
An advowson separated from the manor, and annexed to the person. 2 Bl. Comm. 22; Co.. Litt. 120; 1 Crabb, Real Prop. p. 130, § 118; 3 Steph. Comm. 116.
-- Black's Law Dictionary
Legal Definition
An advowson annexed to the person of the owner and not to his manor or lands.
-- Ballentine's Law Dictionary