Ownership; the legal right to possess and to dispose of property. See also ownership, possession, tenancy. 2 Legal evidence of a person's right of ownership of property; a deed or similar instrument that evidences ownership. adverse title. A title that has been acquired as a result of adverse possession. bad title. A title that cannot legally convey the applicable property to a new owner, usually because of one or more conflicting claims to that property. An unmarketable titleis not necessari...