A person with the legal relation of parent to a child not related by birth, with the same mutual rights and obligations that exist between children and their birth parents. The legal relationship has been finalized.
The adult with whom a relationship is legally established (for) a child not biologically related. Under the adoptive relationship, the child becomes the heir and is entitled to all other privileges belonging to a natural child of the adoptive parent.
A person who completes all the requirements to legally adopt a child who is not his or her biological child. Generally, any single or married adult who is determined to be a "fit parent" may adopt a child. Some states have special requirements, such as age or residency criteria. An adoptive parent has all the responsibilities of a biological parent.