Right of survivorship means that when one co-owner of property dies, their share passes automatically to the surviving owner. No probate, no waiting, and no will involved - the will cannot override it, because the property never enters the estate at all.
In Arizona the words matter. A deed to two people creates a tenancy in common by default, which has no survivorship: the deceased owner's share goes through their estate. Survivorship must be expressly declared, either as joint tenancy with right of survivorship or, for married couples, community property with right of survivorship.
The limit to understand: survivorship only answers the first death. When the surviving owner passes, the property is in one name and needs its own route around probate - a beneficiary deed or a trust.
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Educational information only, not legal advice. Terms have statutory details beyond these summaries - confirm your situation with a licensed professional.