A half sibling is a person who shares one biological parent with another person but not both. This means that they have either the same mother or the same father. For example, if a woman has two children with different partners, those children are considered half siblings to each other. Half siblings can have varying degrees of relationships, similar to full siblings. They may grow up together or meet later in life. The bond between half siblings can be influenced by family dynamics, personal experiences, and the presence of other family members, such as step-siblings or parents.