by Abu Musa
بسم اللہ الرحمن الرحیم
Shaikh Saalim at Taweel (hafithahuAllah) asked the attendees, “Tayyib [okay], here’s a question and I hope it’s not hard for you [to answer], what’s the meaning of Allah?”
[The attendees are silent]
The Shaikh continues: “Are you serious, oh Muslims; you don’t know the meaning of Allah; what’s the meaning of Allah? Oh Muslims, [in a situation] that a disbeliever stops and asks, ‘Who do you worship?’ You’ll reply, ‘ I worship Allah.’ He asks, ‘and what’s the meaning of Allah?’ The name Allah, what’s it mean, hmmm?”
An attendee replies, “Al-Waahid, Al-Ahad” (The One, The Only).
The Shaikh replies, “Al-Wahid, Al-Ahad, hmmm…”
Another attendee replies, “It’s a phrase that describes holiness.”
The Shaikh replies: “Phrase that describes holiness, hmmm, and what’s the definition of such a phrase?”
Another attendee replies, “Allah is the compilation of all of Allah’s names.”
The Shaikh repeats, “What’s the meaning of Allah?”
[The attendees are once again silent].
The Shaikh continues: “Tayyib [okay], this is the benefit of the day, and if for the next ten years you learn nothing but this, then it suffices you – it suffices you to know the meaning of ‘Allah’.
The origin of [the word] ‘Allah’ is Al-Ilaah [The Only One Worshipped In Truth]. ‘Al-Ilaah’ [The Only One Worshipped In Truth] and ‘Allah’ are one and the same. In [the word] Allah, the hamza was deleted for ease of pronunciation, so it [the word Al-Ilaah] became the word, ‘Allah’. And as the brother had said before, we know that the meaning of Al-Ilaah means “The Only One Worshipped In Truth.” So we know that the meaning of ‘Allah’ is “The Only One Worshipped In Truth. [The Shaikh Repeats]: Al-Ilaah – the hamza was deleted for ease of pronunciation and [the word] became ‘Allah’ instead of saying Al-Ilaah; so Allah means, ‘The Only One Worshipped In
Truth,’ so He is indeed The Only One Who is worthy to be worshipped [alone], without any partners.”
http://www.salafyink.com/aqeedah/MeaningofAllah.pdf 
Please check our 
