(construction, plumbing) A device to prevent foul air from rising from the openings of sewers, drains, etc., by means of a water seal.

plural of evolutionary trap

(biology, evolutionary biology) The situation of an evolved behaviour or trait of a species becoming detrimental to the survival or reproductive ability of individuals, possibly leading to extinction.

stairs leading to a trapdoor

(informal) An event or mindset that can cause a person to lose enthusiasm and become discouraged from starting or continuing a project.

A kind of bell-shaped stench trap.

plural of rattle trap

(chiefly US) A situation where the welfare system discourages people who receive government public assistance payments from entering low-paid work because such work does not produce a significant income increase.

plural of poverty trap

The sport of shooting at pigeons liberated, or glass balls or clay pigeons launched into the air, from a trap.