If you have a dream about a bat, the meaning of your dream will depend upon your feelings about these animals.
If you are afraid of bats, then the bat in your dream will represent something that is threatening you in real life.
Traditionally, bats symbolize evil and the occult. If you think of bats in this way, then a bat in your dream symbolizes something that appears to threaten you, but which you do not understand. Your dream is telling you to face your fears and learn to understand them.
On the other hand, if you like bats, then your dream about a bat can have positive connotations.
Bats can fly and, being mammals, they also nurse their young, so a bat can represent your ability to care for others while still retaining your freedom and independence.