What is half sister?

A half sister is a sister with whom one shares only one biological parent. For example, if two people share the same father but have different mothers, they would be half-siblings or half-sisters/brothers. A half-sister can be either older or younger, and the relationship can vary in closeness depending on factors such as how much time they spend together, their personalities, and family dynamics. Half-siblings are a common occurrence in today's society and can often form close bonds despite not having the same biological parents.