The term "Madaf" refers to a rabbinically established form of impurity: Niddah 4b
Impurity Of holy books
Impurity from entry into bodies of drawn water
Impurity Of foods
Impurity Of liquids
Impurity Of hands
Impurity Of territory Outside of Israel
Impurity Of Nochrim
Impurity Of one who emits seed
Impurity Of a field with a grave lost in it
Impurity Of idolatry
Offerings brought with illegal intent
Offerings which travel outside this area
Doubt in establishing the status of potentially impure items