A small-scale watertight treatment system for domestic sewage in which the flow is slowed to allow sedimentation and sludge digestion by bacteria to take place.

(Australia, slang) A large American car. / (US, slang) A pre-1960 American car in Cuba, imported before the US embargo

Alternative spelling of think tank

To perform research and develop recommendations as part of a think tank.

A large tank of water, over which a dunk seat is suspended, which seat can be made to tip or fall into the tank of water, thus dunking whoever is sitting on the seat. It is used as an attraction mainly used in funfairs.

A container of fuel, especially one inside a vehicle.

(US) A vehicle designed to transport liquids or gases in bulk; a tanker / (rail transport) Synonym of tank car.

(military) An armoured fighting vehicle equipped with an antitank gun or missile launcher.

An area for parking or storage of military tanks. / (military, metonymically) The tank inventory of a country or army. / A storage facility with tanks for petroleum, etc.

(US) A fuel tank for gasoline built into equipment, especially vehicles.