Source: The Great Interpretation of Dreams (Ibn Sirin)
The monk in a dream is a heretical man of falsehood and cunning. Whoever sees himself becoming a monk introduces heresy into his religion and mixes with the people of misguidance.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
The monk indicates a man who is eager for the world, showing asceticism while concealing desire. Sitting with him indicates mixing with the people of heresy.
Source: Signs in the Science of Expressions (Ibn Shaheen)
The monk is interpreted as worry and grief. Whoever sees himself speaking to a monk will fall into worry.