A more thorough explanation:

Definition: A half sister is a female who shares one parent with another person. This can be either the same father or the same mother, but not both.

For example, if John has a daughter named Sarah with his first wife, and then later has a daughter named Emily with his second wife, Sarah and Emily are half sisters because they share the same father but have different mothers.

Another example would be if Jane has a daughter named Lily with her first husband, and then later has a son named Jack with her second husband. Lily and Jack are half siblings because they share the same mother but have different fathers.

These examples illustrate the definition of a half sister, which is a sibling who shares only one parent with another person. It is important to note that half siblings can still have strong relationships and bonds, even if they do not share both parents.