Stepbrother (noun)

A brother of one"s stepfather or stepmother but not one"s own parent.

Origin:

The word stepbrother is formed by combining the prefix "step-" (indicating that the relationship is not by blood) and "brother" (indicating a male sibling). the word first appeared in english language in the late 17th century.

Examples:

1. My stepbrother and I have never been particularly close.
2. After her parents divorced, Jane gained a stepbrother and a stepsister.
3. Although he"s not my real brother, I"ve always considered my stepbrother to be just as much a brother as if he were.
4. The stepbrothers didn't get along and often fought with each other.
5. He was always jealous of his stepbrother's good looks and popularity.