Al-Malik — The King
الْمَلِكُ
Name 3 of the ninety-nine. The Sovereign Lord, The One with the complete Dominion
Allah is Al-Malik (in arabic: ٱلْمَلِكُ), the literal meaning in Arabic is "The King.
The root
From the root mim-lam-kaf (م ل ك), which has the following classical Arabic connotations: to possess, to own exclusively to exercise authority to command to have power over, command, reign to have dominion over, to have ruling power to have kingship.
Reflection
Our belief and understanding that Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is Al-Malik (The King) enables us to realize all matters we seek belong with Him. We see how this name encompasses an aura of grandness and majesty. He has complete knowledge, power, and rule over all His creation. So if we seek refuge, we should confide in Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ because only He can help provide relief.
If we seek the bounty, we should ask from the King of kings because He is the only true provider with no limits. This belief also frees us from the shackles of dependence on wealthy leaders that may cause us to compromise our morals and integrity so that we may be in their favor. People will continually try to use fame, money, and power to control and influence our behavior for their benefit.
But for the person who knows Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ as Al-Malik, they can break hold from the power others may hold over us. They see the illusion and don't fall for their tricks. A person who has Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ only needs Allah; they are free from worldly desires and can find happiness within. They can then focus on how to fulfill their duties and obligations as Muslims so that they may live like a King in the akhirah.
There are other verses in the Qur'an that make mention of this name with it's variations. If you'd like further reading you can see Surah Fatiha ayah 4, Surah Burooj ayah 9, Surah al-A'raf ayah 158.
Where it appears
[1] Mishkat al-Masabih 2350,[2] Sahih al-Bukhari 6205