What is the meaning of ڈ?

The seventeenth letter of the Balti alphabet, written in the Arabic script.

The seventeenth letter of the Burushaski alphabet, written in the Arabic script.

The sixteenth letter of the Khowar alphabet, written in the Arabic script; preceded by د and followed by ذ.

The twelfth letter of the Pahari-Potwari alphabet, written in the Shahmukhi script; preceded by د (dāl) and followed by ذ (ẕāl).

The sixteenth letter of the Kashmiri alphabet, written in the Arabic script; preceded by د and followed by ذ.

The twelfth letter of the Punjabi alphabet, written in the Shahmukhi script; preceded by د (dāl) and followed by ذ (ẕāl).

The twelfth letter of the Urdu alphabet, written in the Arabic script; preceded by د and followed by ذ.

Source: wiktionary.org