joint tenancy(A JOINT tenancy is where more than one person is the tenant of a property.; If more than one person own the same property, they are referred to as co-owners, co-tenants or joint tenants. Most common law jurisdictions recognize tenancies in common and joint tenancies, and some also recognize tenancies by the entirety. wiki Alexander Demidov)
multiple souls Widely distributed notion, especially in central and northern Asia and Indonesia, that an individual's life and personality are made up of a complex set of psychic interrelations
multiplicity of class(ряд возможных элементов множества экземпляра класса – другими словами, сколько экземпляров класса может существовать одновременно ssn)