Is my brother my step brother?

yeah, if someone is not born from your biological parents then they are counted as "step" brothers or sisters.

No. A step brother isn't related to you by blood, only by marriage. A full brother has the same mum and dad as you. A half brother shares only one parent with you. Sounds like your 'bro' is a Half Brother. If you had another brother by the same mother but a different father - he would also be your half brother. Not sure what relation the two brothers would be though, technically, as they wouldn't be related by blood....maybe step-brothers??

No. He's your half-brother. A step brother would be if your mother or father married someone who already had a son.

no, a step brother or sister has different biological parents but one of them has remarried and is now your step parent. So if your fathers new wife (your step mother) had children of her own from another man those kids would be your step brothers or sisters.

NO! Everyone else who answered is a moron. If you have the same biological father you are blood brothers. You could say "half" brothers (though that term is lame). Step means you have completely different biological parents but one of your parents married their parent.

The boy is not your Step-Brother, since you share the same dad he is your Paternal Half-Brother.

Step-Sibling is when your dad/mom marries a man/woman, who have a kid from a previous marriage. They are Step-Siblings because this kid would be a parent's Step-Child, thus being your Step-Sibling.

Yes he is your step brother

Step family members are when they're married into your family.

Half family members were born into your family but don't share both of your parents, just one.

yeah step brother

hes ur half brother

He would be your half brother.