Zina
Zina is the Arabic word(زنا) for extramarital or premarital sex.
Islamic law prescribes severe punishments for the act of zina by both men and women. Premarital sex may be punished by up to 100 lashes, while adultery is punishable by stoning. The act must however be attested by at least four witnesses of good character, punishments are reserved to the legal authorities, and false accusations are themselves punished severely. Among the many interpretations of Islamic law, this is the most widespread among Islamic jurisdictions.
Among many cultures, honor killing is widespread mainly due to the intertiwing of a filial or tribal honor with that of the sexuality of those belonging to the families or tribes. It refers specifically to extra-legal punishment by the family against the woman, and as such is forbidden by the sharia.