Plain English Meaning
To send something — a flight, a lesson, or a process — along a different path than originally planned.
Full Definition
To change a planned course of travel, instruction, or flight from its original path to a new one, typically in response to changing conditions, requirements, or student needs.
Context Anchor
Seen in discussions of programmed training, computer-based lessons, and instructor decisions about what a learner should review next.
Derivation
From 're-' (again) plus 'route' (a way or path), originally from the Old French 'route' meaning a chosen course. Literally: to choose the path again.
Why Pilots Care
Reroutes directly affect fuel planning, arrival times, and compliance with airspace rules.