A room or hall designed to stage concerts

(slang) Synonym of supervised injection site

(slang) Synonym of supervised injection site

A fraudulent operation in which the fraudsters contact people who have already been scammed and offer to recover their lost money, but in fact steal more money from the victims.

(euphemistic) a toilet, a lavatory (the room, not the fixture)

(rail transport) A room in a signal box, usually at ground level beneath the operating room, containing the interlocking mechanism for signals and points (track switches) below the lever frame in the operating room.

plural of room temperature

(UK, architecture) British standard form of mudroom / Used other than figuratively or idiomatically: see boot, room. (a room for boots, footwear)

A medically supervised facility providing a hygienic environment in which people can consume illicit recreational drugs, to avoid drug problems such as disease and overdose.

A room which has protection against various external interferences (e.g. electromagnetic signals) for critical application use.