A round brush refers to a type of hairbrush that has a circular shape, with bristles arranged in a rounded pattern. It is commonly used for styling hair, especially for creating volume, adding curls, or straightening. Full definition
Take one section at a time, and using the using round brush and the blow dryer, work them into soft waves. (stylecraze.com)
The best round brush for volume also needs to be able to pick up and gently hold hair of all sizes and shapes, and this brush is a contender. (geekwrapped.com)
Next, load your large round brush with a dark wash and paint around the outside of the shape you have created. (delineateyourdwelling.com)