aviation

Question 1

aviation

Answer 1

the activity of flying aircraft, or of designing, producing, and keeping them in good condition:

Question 2

beacon

Answer 2

a light or fire on the top of a hill that acts as a warning or signal

• As part of the centenary celebrations a chain of beacons was lit across the region.

Question 3

altitude

Answer 3

height above see level

We are currently flying at an altitude of 15,000 metres.

Question 4

airbone

Answer 4

in the air, or carried by air or wind or by an aircraft:

The airborne radioactive particles have covered a huge area of Russia.
Airborne troops were dropped by parachute behind enemy lines.
The old plane had great difficulty getting airborne (= rising into the air).