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.

(idiomatic) A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.

A container, usually made out of glass or acrylic, specifically designed for holding water and marine life. / (slang) A section of a prison for newly arrived inmates.

(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.

plural of tank truck

(slang) Intoxicated.

simple past tense and past participle of tank up

Third-person singular simple present indicative form of tank up