Plain English Meaning
Instead of trying to learn a whole maneuver or procedure all at once, the training is split into smaller chunks. You learn one piece, get comfortable with it, then add the next piece on top.
Full Definition
A teaching approach in which complex flight skills and knowledge are broken down into smaller, self-contained pieces that are taught one at a time and then assembled into the full task. Each segment is mastered before the next is added, and later segments build on the foundation of earlier ones.
Context Anchor
Seen in flight training discussions, especially when an instructor breaks a maneuver, checklist, or procedure into smaller steps for a student pilot.
Derivation
Segmented comes from the Latin segmentum, meaning a piece cut . The phrase pictures instruction as something divided into manageable pieces, like building blocks stacked one on top of the other to form a complete structure.