(air traffic control) an airspace within which it is dangerous for aircraft to fly.

Substances, natural or man-made, which are intrinsically dangerous or otherwise pose a safety hazard. Examples include explosives, poisons, and corrosives.

plural of gap of danger

(usually with the definite article) a breach, place which is hard to defend; a danger, requiring bravery

(Australian rules football) Kicking at the ball when there is a risk of kicking an opposition player who is trying to pick it up or otherwise close to it. Such a kick is against the rules and results in a free kick to the opponent.

plural of danger area

Extra payment given to anybody, civilian or soldier, who is employed in a situation where the working conditions or locale are considered to be hazardous.

It is necessary to foresee danger as it helps you to avoid it.

Alternative form of a little knowledge is a dangerous thing

(humorous) One is fearless or a daredevil