KFR meaning in International ?

Kafir (Arabic: كافر‎ kāfir; plural كَافِرُونَ kāfirūna, كفّار kuffār or كَفَرَة kafarah; feminine كافرة kāfirah; feminine plural كافرات kāfirāt or كوافر kawāfir) is an Arabic term which, in the Islamic tradition, refers to a person who disbelieves in God as per Islam, or denies the authority of God, or rejects the tenets of Islam. The term is often translated as "infidel", "pagan", "rejector", "denier", "disbeliever", "unbeliever", "nonbeliever". The term is used in different ways in the Quran, with the most fundamental sense being "ungrateful" (toward God). Kufr means unbelief, "to be thankless", "to be faithless", or "ingratitude". Its opposite is īmān or faith.

Kafir is sometimes used interchangeably with mushrik (مشرك, those who practice polytheism), another type of religious wrongdoer mentioned frequently in the Quran and other Islamic works. (Other, sometimes overlapping Quranic terms for wrong doers are ẓallām (villain, oppressor) and fāsiq (sinner, fornicator).) Historically, while Islamic scholars agreed that a polytheist/mushrik is a kafir, they sometimes disagreed on the propriety of applying the term to Muslims who committed a grave sin or to the People of the Book. The Quran distinguishes between mushrikun and People of the Book, reserving the former term for idol worshipers, although some classical commentators considered Christian doctrine to be a form of shirk. In modern times, kafir is sometimes applied towards self-professed Muslims particularly by members of Islamist movements. The act of declaring another self-professed Muslim a kafir is known as takfir, a practice that has been condemned but also employed in theological and political polemics over the centuries. A person who denies the existence of a creator might be called a dahri.

The Qur'an prohibits the unlawful murdering of non-Muslims.