Brownout refers to a temporary reduction in electrical power supply, often caused by high demand or maintenance issues. The antonym for brownout is blackout, which refers to a complete loss of power. During a blackout, all electrical equipment and appliances cease to function, causing inconvenience and disruption. Another antonym for brownout is power surge, which occurs when there is a sudden spike in electrical current, causing damage to equipment and devices. A power surge is usually caused by lightning or faulty wiring, and it can result in significant financial loss. In summary, brownout is a term used to describe a partial loss of power, while blackout and power surge are its antonyms.