Kosovo as the UN Security Council record has it, and as Serbia's Constitution describes it
Background
UN Security Council resolution 1244 (1999) was adopted by 14 votes to none, with China abstaining.
It authorised international civil and security presences in Kosovo under United Nations auspices and an interim administration.
It reaffirmed the sovereignty and territorial integrity of the Federal Republic of Yugoslavia and called for substantial autonomy for Kosovo.
Serbia's Constitution says Kosovo and Metohija is an integral part of Serbia's territory with the status of substantial autonomy.
Article 182 names two autonomous provinces: Vojvodina, and Kosovo and Metohija.
In plain words
UNSC United Nations Security Council — The UN body with primary responsibility for international peace and security.
Metohija Metohija — The Serbian name used with Kosovo for the region, as in 'Kosovo and Metohija'.