Within the past few decades, the configuration "family" has included diverse living arrangements, yet traditional definitions of family persist. Accordingly, family studies scholars have discussed research strategies and theoretical approaches to define the shifting boundaries of family. In this article I propose the approach of new materialism for a contemporary definition of family that focuses on situated processes and the complex interplay of material-discursive differentiation processes. This perspective enriches current debates on defining family by adding concepts of intracontextual posthuman practices and multilocal forms of agency to the discussion, thus allowing for a definition of family that helps make comprehensible today's ever-transforming configurations.
Keywords: Close relationships; early parenting; family diversity; family life; family theory; feminist theory.