Rabb (Arabic: رب, lit. 'lord') is an Arabic word to refer to God as Lord[1] The term is used by Arabs and Punjabis.[2][3]
In the Quran, God refers to himself as "Rabb" in several places. When it is used with the definite article (al-Rabb) the Arabic word denotes "the Lord (God)". In other cases, the context makes it clear as to whom the word is referring to, in this case, "rabb" refers to "owner, master", for example rabb al-dar (رَبُّ ٱلْدَّار) means "master of the house/residence".
God in Islam is referred to by many qualities and attributes. In the first Surah, Al-Fatihah of the Quran, introduces this Title "Rabb" in the first Verse, "All Praise and Gratitude is due to God, Rabb of all the worlds and Universe", thus stating clearly that God takes care, nourishes, fosters through every stage of existence, in which everything between that exists.
In the Indo-Gangetic plain, especially in the Punjab region, the term "Rabb" or "Rab" is used by Muslims, Sikhs, Hindus and Christians to refer to God.[3]
Indeed, "Lord" is a direct translation of the Arabic word Rabb.
After the rise of Islam, Jews, Christians, and Muslims used "Allah" for Elohim and "theos" when they quoted or translated the Bible in Arabic as they did in their dialogues together. Arabicish versions have tended to transliterate Yahweh or use the word rabb (Lord) as Jews used adonai.
For instance 'Rabb' is the most popular Name of God in Punjabi. Hindus, Muslims and Sikhs frequently use this Arabic word which means Lord or Master.