Definition
The defined path an aircraft follows from its departure point to its destination, made up of a sequence of waypoints, navigation aids, airways, or fixes. A route is what gets filed in a flight plan and loaded into navigation systems for the aircraft to follow.
Plain English
The path the aircraft is going to fly, described as a series of points along the way from where it takes off to where it lands.
Context Anchor
Seen in flight planning, air traffic control clearances, aviation notices, and abbreviated airport or airspace information.
Derivation
From the Old French 'route', meaning a path or way, which came from the Latin 'rupta via' — literally a 'broken' or 'opened-up' way. The aviation meaning keeps that same idea: the established path from one point to another.
Why Pilots Care
The route is what ATC clears the pilot to fly and what the aircraft's navigation systems use to guide the flight. A wrong or outdated route loaded into the system can lead to airspace violations, missed waypoints, or going somewhere other than intended.
Intuition Check
Do not read route as just a general direction or a rough idea of where to go. In aviation, a route is the specific path that is planned, published, assigned, or expected.
Example Sentence 1
After receiving the clearance, the pilot loaded the new route into the GPS before taxiing.
Example Sentence 2
ATC cleared the aircraft to proceed via the published RTE after departure.