a place where research or planning is done, esp secret research in wartime (as modifier): back-room boys
WordReference Random House Unabridged Dictionary of American English © 2025
back′ room′,
- a room located in the rear, esp. one used only by certain people.
- British Termsa place where powerful or influential persons, esp. politicians, meet to plan secretly or from which they exercise control in an indirect manner:The candidate for mayor was chosen in the precincts' back rooms.
- 1585–95
Collins Concise English Dictionary © HarperCollins Publishers::
'back room' also found in these entries (note: many are not synonyms or translations):