(economics, business, of goods) having features added to a basic line or model for which the buyer is prepared to pay extra

A non-return valve allowing atmospheric air into a boiler, if a cold boiler reduces its internal pressure on cooling down.

An automatic non-return valve that opens when the boiler is at less than atmospheric pressure so as to avoid any risk of vacuum collapse when a hot boiler is allowed to cool down out of service.

A blowdown valve mounted at the water level of a boiler, used to blow down lighter oily or foamy deposits that float on the water.

(architecture) The concept of designing a building so that, if it eventually collapses, it will leave behind aesthetically pleasing and long-lasting ruins.

A decorative hanging; a valance.

Furnished or ornamented with a valance.

The price of an illicit drug sold on the black market.

(law) An instance of a person falsely claiming to have served in the military, or of a member of the military falsely claiming to have served in hazardous conditions, in order to gain the respect and other benefits associated with such service.

plural of Valley girl