What is the meaning of قاف?

Name of the 21st letter of the Arabic alphabet (ق (q)), representing the sound /q/ (Standard, Moroccan, Algerian, Tunisian, Druze, etc.), /ɡ/ (Hejazi, Najdi, Libyan, Southern Iraqi, etc.), /ʔ/ (Levantine, Egyptian, etc.).

to trace, to follow the spoors of, to track

to know the state or the relationships of by external signs

to suck the udder of

the letter ق

Source: wiktionary.org