(informal) An explosives expert. A person who sets explosives.

(historical) Any of several poisons used for murder, but especially arsenic and, to a lesser extent, thallium.

Explosive powder used for blasting tree stumps when clearing land.

A simple form of gunpowder, consisting of a mixture of saltpetre, charcoal, and sulfur.

A mixture of spices, usually including turmeric, commonly used in Asian-style cooking.

A barrel containing gunpowder. / (figuratively) An explosive or otherwise volatile situation.

plural of powder keg

(medicine, dated) A powder of ipecac and opium formerly used to treat colds and fevers.

A bitter powder found in the interspaces of the wood of a Brazilian tree (Vataireopsis araroba) and used to treat eczema and other skin diseases.

(US) Affected with dry rot; reduced to dust by rot.