Dreaming of a hag is a sign for the wisdom of the eternal female nature. Seeing a hag in your dream, may represent nurturance. Negatively, to see a hag is explained as the dream with unfortunate symbolism. This dream means that you are owerpowered by your mother.
Dream dictionary: Hag dream meanings
(See Old woman)
…that I awoke. Everything was very quiet and the room pitch dark. I was turning over to try sleeping on my other side, when I suddenly saw a light, and, on looking up, perceived, to my surprise and terror, the luminous face of a diabolical old hag pressed against the window, which was at least thirty feet from the ground. Having slept in the house for several months without seeing anything abnormal, I had hitherto attributed the rumour that it was haunted to the superstition of the peasantry, in the first place, and, in the second place, to their insatiable love of foolish gossip. Now, however, as I gazed at the hideous countenance, and rubbed my eyes to make sure I was not dreaming, I felt that the gossip I had scorned was only too well founded, and I determined that nothing should induce me to sleep in that room…
…old woman in a dream also represents non-arable land. If one sees her wearing a veil in the dream, it means that he will meet with hardships and regret. If one sees an ugly old woman, or a hag in a dream, it means adversities and war. If a young woman sees herself as an old woman in a dream, it means earning respect and dignity. An unknown old woman in a dream also represents a bad crop for that year. If one sees an old woman descending from the skies and people are wondering about her, she represents the passing year. Seeing an ugly old woman in a dream also could mean glad tidings of an ending war, or the end of drought. An emaciated old woman in a dream represents a year of drought. If she gains weight and turns beautiful in the dream, she represents changes in…