from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A tower at an airfield from which air traffic is controlled by radio and observed physically and by radar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An airport building from which the air traffic control unit monitors and directs the movement of aircraft on and around the airport.
- n. An enclosed, raised structure occupied by one or more persons who operate or exercise control over railway traffic, ship movement, a racetrack, machinery, etc.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a tower with an elevated workspace enclosed in glass for the visual observation of aircraft around an airport
Sorry, no etymologies found.