From The Collaborative International Dictionary of English v.0.44 [gcide]:
Aviation \A'vi*a"tion\, noun The art or science of flying.
From WordNet (r) 2.0 [wn]:
noun
1: the aggregation of a country's military aircraft [syn: {air power}]
2: the operation of aircraft to provide transportation
3: the art of operating aircraft [syn: {airmanship}]
4: travel via aircraft; "air travel involves too much waiting in airports"; "if you've time to spare go by air" [syn: {air travel}, {air}]
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