Plain English Meaning
Being affected by alcohol or drugs to a point where your body and mind no longer work properly. Even a small amount can be enough to make flying unsafe.
Full Definition
A state of impaired physical and mental function caused by alcohol or other drugs in the body, affecting judgment, coordination, reaction time, vision, and decision-making. In aviation, intoxication includes any level of impairment from alcohol or drugs that degrades a pilot's ability to safely operate an aircraft, even when blood alcohol concentration is below legal driving limits.
Context Anchor
Seen in aeromedical, alcohol, preflight fitness, and personal minimums discussions.