A specifically hazardous place to be avoided, usually demarcated, such as an area with anti-personnel mines / (figuratively) the genitals

plural of gap of danger

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

plural of danger area

possessing a weapon and likely to try to harm or kill someone by using it

plural of danger signal

(rail transport) A signal set at danger and showing a red light or other stop indication, which a train driver must not pass until it changes or until manually cleared past the signal by a dispatcher.

Alternative spelling of danger signal.

plural of danger-signal

(law) One of two conditions which must be asserted in an action to obtain a protective order or injunction to be granted and relief sought (the other condition being fumus boni iuris).