How is "family member" defined in this context?

The definition of "family member" in this context is specifically rooted in legal terminology, which often delineates relationships that are recognized by blood, adoption, or marriage. This definition is crucial as it establishes the boundaries of familial relationships in legal situations, particularly in cases regarding children's welfare, custody, and support.

Understanding this definition helps to clarify who is included as a "family member" in terms of legal rights and responsibilities. By focusing on blood, adoption, or marital ties, the definition excludes those relationships that, while significant, may not bear the same legal weight in family law, such as non-relatives living in the same household or friends. This precision is essential for ensuring effective legal interpretation and application of family law statutes and proceedings.