brother-in-law (sister's husband, of a male) (my) Definition brother-in-law (sister's husband, of a male) (my)𐓏𐒻𐓈𐒰͘𐒹𐒰unspec. comp. form of𐓏𐒻-𐓈𐒰͘𐒹𐒰𐓈𐒰͘𐒹𐒰͘