What is the meaning of the name Adil?

Adil can refer to two Arabic names: Adeel and Aadil. Adil is an acceptable spelling of both Adeel and Aadil, the way you pronounce it determines which name it is. If you pronounce it uh-deel, it is another spelling of Adeel, and if you pronounce it aa-dil, it is another spelling of Aadil.

To put it another way, both the names Adeel and Aadil can be written as Adil. The pronunciation tells you which name it is. For more information see these two pages: Adeel | Aadil.