الرَّبّ Ar-Rabb (the Lord and Nurturer) the Lord and Master who has none like Him in His Lordship, the One Who nurtures and rectifies the affairs of the creation by the favours which He showers upon them, the Sovereign Owner Who alone creates and commands, the One Who controls the affairs and grants blessings, the One Who nurtures, the Creator, the Provider, the One Who aids and the One Who guides.
[Source: The Ninety-Nine Names of Allaah – Dawud Burbank [Audio|En] & Transcribed PDF]
The Meaning of Ar-Rabb, the Lord
Ar-Rabb is the owner who has full authority over his property. Ar-Rabb, linguistically means, the master or the one who has the authority to lead. All of these meanings are correct for Allah. When it is alone, the word Rabb is used only for Allah. As for other than Allah, it can be used to say Rabb Ad-Dar, the master of such and such object. Further, it was reported that Ar-Rabb is Allah’s Greatest Name.
Source : Tafseer Ibn Kathir, Surah Fathiha, Dar-us-salam English publication
Shaikh Saalih ibn Saalih al-Fawzaan haafidhahullaah said in Sharh Usool-ith-Thalaathah:
And Ar-Rabb (the Lord) is the One Who is worshipped,
and the proof is His saying, He the Most High:
يَا أَيُّهَا النَّاسُ اعْبُدُوا رَبَّكُمُ الَّذِي خَلَقَكُمْ وَالَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ
الَّذِي جَعَلَ لَكُمُ الْأَرْضَ فِرَاشًا وَالسَّمَاءَ بِنَاءً وَأَنزَلَ مِنَ السَّمَاءِ مَاءً فَأَخْرَجَ بِهِ مِنَ الثَّمَرَاتِ رِزْقًا لَّكُمْ ۖ فَلَا تَجْعَلُوا لِلَّهِ أَندَادًا وَأَنتُمْ تَعْلَمُونَ
O mankind, single out your Lord with all worship, He Who created you and those who came before you so that you may be dutiful to Him, seeking to avoid His anger and His punishment. He Who made the earth a resting place for you and the sky a canopy, and He sent down from the clouds rain, and He brought out with it crops and fruits from the earth as provision for you, so do not set up rivals for Allaah whilst you know that you have no Lord besides Him. [2:21-22] (#9)
[#9]: His saying, “And Ar-Rabb (the Lord) is the One Who is worshipped”: meaning, He is the One Who deserves to be worshipped, as for other than Him, then it does not deserve worship, because it is not a Lord. This is the intent of the speech of the Shaikh rahimahullaah in his saying, “Ar-Rabb (the Lord) is the One Who is worshipped”, meaning He is the One Who deserves worship. Then also it is not sufficient that a person just affirms Ar-Ruboobiyyah (Lordship), rather he must affirm Al-‘Uboodiyyah (Allaah’s deserving all worship), He the Perfect and Most High, and he must carry it out making it purely and sincerely for Him, the Perfect and Most High. So since he has affirmed that He is Ar-Rabb (the Lord) then it is binding upon him to affirm that he is Al-Ma‘bood (the One Who therefore deserves to be worshipped), and that others besides Him do not deserve anything from worship.
Source : Sharh Usool-ith-Thalaathah – Explanation of the Three Fundamental Principles – of Imaam Muhammad ibn ‘Abdil-Wahhaab [1115-1206 H], Explained by Shaikh Saalih ibn Saalih al-Fawzaan haafidhahullaah, Lesson 20: The Lord is the One Who is Worshipped; The Meaning and Types of Worship (And Ar-Rabb (the Lord) is the One Who is worshipped…)
الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ
<<All the praises and thanks be to Allâh, the Lord of the ‘Alamîn (mankind, jinns and all that exists)>>. (Surah Faathiha v.2)
(V.1:2) Lord: The actual word used in the Qur’ân is Rabb. There is no proper equivalent for Rabb in the English language. It means the One and the Only Lord for all the universe, its Creator, Owner, Organizer, Provider, Master, Planner, Sustainer, Cherisher, and Giver of security. Rabb is also one of the Names of Allâh.
Source : Surah Fatiha – Translation of the meanings of The Noble Qur’an , in the English Language , By Dr. Muhammad Taqiuddeen al-Hilaalee and Dr. Muhammad Muhsin Khan