What is the meaning of joint tenancy?

joint tenancy is an estate or unit of interest in real estate that is owned by two or more natural persons with rights of survivorship. The basic idea of a joint tenancy is unity of ownership; title is held as though all owners collectively constituted one person, a fictitious entity. The death of one joint tenant does not destroy the owning unit-it only reduces by one the number of persons who jointly own the unit. The remaining joint tenants receive the deceased tenant's interest by the right of survivorship. Thus, the decedent's interest cannot be transferred by will or descent. As each successive joint tenant dies, the remaining tenants acquire the interest of the deceased. The last survivor takes title in severalty, fully inheritable at his or her death by heirs and devisees. (See four unities).