stepbrother

US /ˈstepˌbrʌ.ðɚ/
UK /ˈstepˌbrʌ.ðɚ/
"stepbrother" picture
1.

the son of one's step-parent by a previous marriage

:
My stepbrother and I get along really well.
He met his stepbrother for the first time at his father's wedding.