What does "heriot" mean?

Heriot: Formerly, a payment or tribute of arms or military accouterments, or the best beast, or chattel, due to the lord on the death of a tenant; in modern use, a customary tribute of goods or chattels to the lord of the fee, paid on the decease of a tenant. Blackstone. Bouvier. Heriot custom, a heriot depending on usage. -- Heriot service (Law), a heriot due by reservation in a grant or lease of lands. Spelman. Blackstone.