'aviation' definitions:
Definition of 'aviation'
(from WordNet)
noun
The aggregation of a country's military aircraft [syn: aviation, air power]
noun
The operation of aircraft to provide transportation
noun
The art of operating aircraft [syn: aviation, airmanship]
noun
Travel via aircraft; "air travel involves too much waiting in airports"; "if you've time to spare go by air" [syn: air travel, aviation, air]