Islamic Interpretation of Dreams (Ibn-i Sirin):

(Manager; Rich man; Treasurer) A water mill in a dream represents a person who handles large amounts of cash, or who is an extremely wealthy person.

Ifone seeks him, his needs will be satisfied and he will not return empty handed.

Ifone sees a water mill in operation in a dream, it means coming profits, or benefits for one’s life and his family through the person operating it.

A water mill in a dream also represents one’s helpers, clan, easing of one’s difficulties, 470 or it could mean rain.

(Also see Hand mill)