What is considered a half brother?
Half-siblings are people who share one parent. They may share the same mother but different fathers (in which case they are known as uterine siblings or maternal half-siblings), or they may have the same father but different mothers (in which case, they are known as agnate siblings or paternal half-siblings.
What is a stepbrother?
Noun. stepbrother (plural stepbrothers) The son of one's stepparent who is not the son of either of one's biological parents. The stepson of one's parent who is not one's half-brother.
Is it okay to date your half brother?
There are no laws restricting dating. But if you mean dating and later marrying, well that's a different story, as most countries have laws regarding marriage. In many places it is not legal as you're blood relatives, either by common mother or father.