Plain English Meaning
Being genuinely good at something — not just knowing about it, but knowing what to do, when to do it, and how to handle situations that don't go to plan. It's built up over time through real practice, not just study.
Full Definition
A high level of knowledge, skill, and judgment in a specific domain, developed through extended deliberate practice, real-world experience, and reflection, allowing the practitioner to recognize patterns, make accurate decisions quickly, and perform reliably under varied and demanding conditions.
Context Anchor
In the Aviation Instructor’s Handbook, this term appears in discussions of how pilots and instructors move from basic learning toward skilled, dependable .