the official who signals the beginning of a race or competition
"The dispatcher blew the starting whistle, signaling to all the runners that they could finally begin their race."
employee of a transportation company who controls the departures of vehicles according to weather conditions and in the interest of efficient service
"The dispatcher cancelled several flights due to the sudden snowstorm to ensure every departing plane could safely reach its destination."
agent noun of dispatch; one who dispatches
"The air traffic dispatcher quickly rerouted all incoming flights to avoid the storm system."