To "host an event" means to organize and manage a gathering or occasion, providing facilities, resources, and services necessary for its successful execution. It involves making arrangements such as choosing a date, setting up a venue, preparing food and beverages, coordinating with guests or participants, and ensuring that everything runs smoothly during the event. The host is responsible for overseeing all aspects of the occasion to ensure it meets its intended purpose, whether it's a social gathering, business meeting, or celebration.