What is a half sister or brother?

Answer 1

A half-brother or half-sister is someone who you share ONE and only one parent with, either a father or a mother.

Answer 2

A half brother or sister is realted by blood. meaning they either have the same mother or same dad.

Answer 3

It means two people have one parent in common but not the other; for example, say you and I have the same mother but not the same father; we would be half-brothers.