Source: The Great Interpretation of Dreams (Ibn Sirin)
Cutting the ear in a dream indicates the death of the wife or daughter, or corruption in religion.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Cutting the ear indicates hearing bad news or removal from a position.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Cutting the ear is interpreted as worry. Whoever sees his ear cut will be afflicted with worry.