What is the slot time? What does it mean in aviation?

How airport slots are allocated to airlines airport slot The World's Leading Airport Slot Coordinator Airport Coordination Limited is the world's leading and largest Airport Slot Coordinator, working with 72 airport slot Slot allocation is only regulated at 'coordinated airports' These airports have insufficient capacity to meet actual or planned airline

airport slot coordination Slots are allocated in accordance with guidelines set out in Worldwide Slot Guidelines Airports throughout the world are categorised as either Level