Plain English Meaning
A talk after the flight where the instructor and student go through what happened, what worked, what didn't, and what to focus on next time.
Full Definition
A structured discussion held immediately after a training flight in which the instructor and learner go over what happened during the flight, identify what was done well, address errors or areas for improvement, and confirm the learner's understanding of the lesson objectives.
Context Anchor
Used in flight training after the airplane is parked and the flight is complete, often before the next lesson is planned.
Derivation
Post comes from Latin meaning 'after.' Flight is the act of flying. Review comes from Latin re- ('again') and videre ('to see') -- literally 'to look at again.' So a postflight review is 'looking again at what happened after the flight.'