In the context of painting, a "brush" is a handheld tool used to apply paint, varnish, or other coatings to surfaces. It typically consists of a handle (made of wood or plastic), a ferrule (metal band that holds the bristles), and bristles (natural or synthetic fibers) that hold and spread the paint.
Brushes come in various shapes and sizes, such as flat, angled, or round, and are chosen based on the type of paint being used and the surface being painted. In professional painting, especially in Australia, high-quality brushes are essential for achieving a smooth, even finish and for cutting in edges with precision.
In a broader sense, "brush" can also refer to the action of applying paint with such a tool.