A substance, natural or man-made, which is intrinsically dangerous or otherwise poses a safety hazard. Examples are materials which are explosive, poisonous, chemically active (including acids and other corrosives), radioactive, or biologically active (including human blood and other medical waste).

(English billiards) When one's cue ball strikes some other ball and causes that other ball to sink into a pocket. If the sunken ball is the red ball then one scores three points, but if the sunken ball is the other player's cue ball then one scores two points.

(English billiards) The situation where one's cue ball bounces off another ball and then sinks into a pocket. If the ball bounced off is the red ball, then three points are scored; but if it is the opponent's cue ball, then two points are scored.

Something that could potentially endanger a person's health.

plural of health hazard

plural of hazard light

Danger pay.

plural of chemical hazard

(idiomatic) To make a guess; to guess.

(archaic) A game of chance played with dice for very small stakes.