An airbrush is a small, air-operated tool that sprays paint or ink. It uses compressed air to atomize the liquid, creating a fine mist that can be applied to various surfaces. Airbrushes are commonly used in art, makeup, and model painting, allowing for detailed and smooth applications. Airbrushes come in different types, including single-action and double-action models. Single-action airbrushes control the paint flow with a single trigger, while double-action models allow for more precise control over both air and paint. They are popular among artists and hobbyists for their versatility and ability to create intricate designs.