The term "LASER" is an acronym that stands for Light Amplification by Stimulated Emission of Radiation. In simple terms, a laser is a device that produces and emits a highly focused beam of light through a process called stimulated emission. This light beam can be used in various applications such as cutting, welding, engraving, or even medical treatments like hair removal or eye surgery. The term "laser" has become synonymous with any device that produces a narrow and intense beam of light through the process of stimulated emission.