What is Incorporeal Hereditament?

Legal Definition
Title, estates. A right issuing out of, or annexed unto a thing corporeal.

2. Their existence is merely in idea and abstracted contemplation, though their effects and profits may be frequently the objects of our bodily senses. Co Litt. 9 a; Poth. Traite des Choses, 2. According to Sir William Blackstone, there are ten kinds of incorporeal hereditamenta; namely, 1. Advowsons. 2. Tithes. 3. Commons. 4. Ways. 5. Offices. 6. Dignities. 7. Franchises. 8. Corodies. 9. Annuities. 10. Rents. 2 Bl. Com. 20.

3. But, in the United States, there, are no advowsons, tithes, dignities, nor corodies. The other's have no necessary connexion with real estate, and are not hereditary, and, with the exception of annuities, in some cases, cannot be transferred, and do not descend.
-- Bouviers Law Dictionary
Legal Definition
Anything, the subject of property, which is inheritable and not tangible or visible. 2 Woodd. Leet. 4. A right issuing out of a thing corporate (whether real or personal) or concerning or annexed to or exercisable within the same. 2 Bl. Comm. 20; 1 Washb. Real Prop. 10; Hegan v. Pendennis Club (Ky.) 64 S. W. 465; Whitlock v. Greacen, 48 N. J. Eq. 359, 21 Atl. 944; Stone v. Stone, 1 R. I. 428.
-- Black's Law Dictionary
Legal Definition
Incorporeal property which may be inherited, e. g., rent.
-- Ballentine's Law Dictionary