Dreaming of a paintbrush expresses your desire and urge to display your creativity and ideas. It may also represent a feeling of life being depicted as an empty canvas where you would take the paintbrush and decide to paint it the way you see fit. This may signify your need and desire to be the one who is in control of your life.
If you are dreaming of a paintbrush, you can be viewed as a scholarly person who enjoys the different aspects of culture and visual arts.