Seeing a bat in your dream may signify new information or joyful news. Particularly if you are pregnant, it could symbolize good news for you. The presence of a bat is sometimes considered a symbol of a hermit, indicating the importance of peace and patience in your life. This dream could also mark the beginning of significant changes in your life.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Bat" (page 31).
By God's leave, a bat was one of the many signs of God's prophet Jesus son of Marry, upon both of them be peace. In a dream, a bat may represent a monk. It also means glad tidings for a pregnant woman. Seeing a bat in a dream is not considered as a good omen for a traveller. If a bat flies into a house in a dream, it means the demolition of that house or the separation of that family. A bat in one's dream also represents a witch, or an unjust person who may have suffered from deprivation in his childhood. A bat in a dream also signifies blindness, heedlessness, a child of adultery, or a bastard son. In a dream, a bat also means hiding from people because of one's evildoing, such as theft or eavesdropping. Seeing a bat in a dream also means the end of enjoying blessings and not acknowledging their true provider. A bat in one's dream also means having to change one's living standards.
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.
