Source: The Great Interpretation of Dreams (Ibn Sirin)
An old woman in a dream is the worldly life (dunya). A beautiful old woman is a world approaching with goodness. An ugly one is a world turning away with evil. Her death indicates the demise of the worldly life.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
An old woman indicates a year. A fat old woman is a fertile year, and a thin one is a year of drought.
Source: Signs in the Science of Expressions (Ibn Shaheen)
An old woman is interpreted as worry. Whoever sees himself speaking to her will be afflicted with worry.