What is Advowson Donative?

Legal Definition
Where the patron has the right to put his clerk in possession by his mere gift, or deed of donation, without any presentation to the bishop, or institution by him. 2 Bl. Comm. 23; 1 Crabb, Real Prop. p. 131, § 119.
-- Black's Law Dictionary
Legal Definition
An advowson whereby the patron may give a church or a chapel without presentation, institution or induction.
-- Ballentine's Law Dictionary