1. (

• aviation ,
• air_power

) the aggregation of a country's military aircraft ;

2. (

• aviation ,

) the operation of aircraft to provide transportation ;

3. (

• aviation ,
• airmanship

) the art of operating aircraft ;

4. (

• air_travel ,
• aviation ,
• air

) travel via aircraft; "air travel involves too much waiting in airports"; "if you've time to spare go by air" ;