In a dream, eavesdropping means backbiting and lies. Perhaps the one who is eavesdropping on others may become despised by the ruler or his superior. On the other hand, if one sees himself in a dream inadvertently listening to a conversation, and if the one seeing the dream is a merchant, it means that he will resign from the leadership of his business, and ifhe is a ruler, it means that he will be removed from his post.
If one sees himself harkening to another person in a dream, it means that he desires to defame him or expose his pitfalls.
If one sees himself listening to some talks of which he follows the better avenues in the dream, it means that he will receive glad tidings.
If one sees himself listening to admonition but ignoring it in a dream, it means that he lies as a habit.... Islamic Dream Interpretation
To dream that you are eavesdropping indicates that you need to pay closer attention in your waking life to what you are being told. Your dream may also be telling you to be more open to hearing the guidance and/or criticism of others.... My Dream Interpretation
A dream in which others are eaves- dropping is a warning that you are facing a dilemma from which it will be diffi- cult to extricate yourself. But any dream in which you are the eavesdropper is a forerunner of unan- ticipated good luck.... The Complete Guide to Interpreting Your Dreams