The right of support is an easement which one man, either by contract or prescription, enjoys, to rest the joists or timbers of his house upon the wall of an adjoining building, owned by another person.
Law Dictionary – Alternative Legal Definition
(verb) – To support a rule or order is to argue in answer to the arguments of the party who has shown cause against a rule or order.
(noun) – The right of support is an easement consisting in the privilege of resting the joints or beams of one’s house upon, or inserting their ends into, the wall of an adjoining house belonging to another owner. It may arise either from contract or prescription. 3 Kent, Comm. 436. Support also signifies the right to have one’s ground supported so that it will not cave in, when an adjoining owner makes an excavation.