Legal Definitions - stepbrother

A stepbrother is a male who is the son of one's stepparent. This means that they are not biologically related to you, but they are part of your family because of a marriage or partnership between one of your parents and their parent.

• John's mother married Sarah's father, making John and Sarah stepbrother and stepsister.
• After his father remarried, Tom gained two stepbrothers, Mike and Jake.

These examples illustrate how stepbrothers are related through a marriage or partnership between their parents. They may not have grown up together or have a close relationship, but they are still considered family.