1.the process or job of giving instructions to pilots by radio 空中交通管制
2.the people whose job is to do this 空中交通管制员
Examples from the Corpus
air traffic control• I would have needed an air traffic control centre to keep track of where everyone was at any given moment.• Mogadishu s transitional government has started talking of reopening the capital s airport and getting its air traffic control back.• The co-operation of air traffic control is central.