A "full sibling" refers to a brother or sister who shares both biological parents. This means they have the same mother and father, resulting in a higher genetic similarity compared to half-siblings or step-siblings. Full siblings typically grow up in the same household, sharing experiences, upbringing, and family traits. The relationship between full siblings can vary widely, ranging from close companionship to rivalry. They often share a unique bond due to their shared genetics and upbringing, which can influence their personalities and life choices. Full siblings are considered part of the same immediate family unit, contributing to family dynamics and support systems.