Multifunctional biomaterials is an academic concept and research field dedicated to the design, synthesis, and characterization of materials for biological applications that simultaneously exhibit two or more distinct, beneficial properties or functions. This field investigates how to engineer materials, often through composite formation or hierarchical design, to perform integrated roles such as providing structural support, delivering therapeutic agents, enabling diagnostics, or eliciting specific biological responses. The significance of multifunctional biomaterials lies in their capacity to address complex biomedical challenges requiring integrated capabilities, advancing areas like regenerative medicine, targeted therapy, and advanced diagnostics.