Plain English Meaning
A hazard is something already there that could cause trouble — a worn tire, a thunderstorm nearby, a tired pilot. It is the condition itself, not the bad outcome it might lead to.
Full Definition
A present condition, event, object, or circumstance that could lead to or contribute to an unplanned or undesired event such as an accident. A hazard is the source of potential harm; it exists before any incident occurs.
Context Anchor
Seen in risk management discussions when a pilot is identifying what could go wrong before or during a flight.
Derivation
From Old French 'hasard,' originally a game of dice, later meaning chance or risk. In aviation, the word keeps that sense of a present condition carrying the chance of harm.
Why Pilots Care
Recognizing hazards early lets pilots assess the risks and apply before a becomes an accident.