Ummah (Arabic: ????) is an Arabic word meaning “community” or “nation”. It is commonly used to mean either the collective nation of states, or (in the context of pan-Arabism) the whole Arab world. In the context of Islam, the word ummah is used to mean the diaspora or “Community of the Believers” (ummat al-mu’minin), and thus the whole Muslim world.
The phrase Ummah Wahida in the Qur’an (the “One Community”) refers to all of the Islamic world unified. The Quran says: “You [Muslims] are the best nation brought out for Mankind, commanding what is righteous (Ma’ruf – lit. “recognized [as good]“) and forbidding what is wrong (Munkar – lit. “unrecognized [as good]“)….” [3:110].
On the other hand, in Arabic Ummah can also be used in the more Western sense of nation, for example: Al-Umam Al-Muttahida, the United Nations.
The Constitution of Medina, an early document said to have been negotiated by Muhammad in AD 622 with the leading clans of Medina, explicitly refers to Jewish and pagan citizens of Medina as members of the “Ummah.”
The Organization of the Islamic Conference (OIC) is the main organization representing whole Muslim Ummah.
Modern Hebrew ?????? Ummah means “nation.”
Source: http://en.wikipedia.org/wiki/Ummah
See also: Idul Fitri, Hamper Hari Raya, Hari Raya Hampers