A stepbrother is a boy or man who is the son of only one of your parents.
Stepbrothers can be like real brothers, but sometimes they are not as close.
Examples:
My stepbrother is older than me.
I play games with my stepbrother.
My stepbrother and I have the same dad.
My stepbrother always eats all the cookies!
My stepbrother is as tall as a tree!
I love my stepbrother even when he is annoying.