1. areas behind the main public spaces of a building, typically used for storage, offices, or employee work areas
2. private or restricted areas where important decisions are made away from public view
Usage: informal
3. a fictional concept describing endless, monotonous yellow rooms that exist outside normal reality
Usage: internet culture; creepypasta

Examples

• The employees gathered in the backrooms during their break.
• Visitors aren’t allowed in the backrooms of the museum.
• The real negotiations happened in the backrooms after the public meeting.
• Political deals are often made in the backrooms of government buildings.
• The backrooms meme became popular on social media platforms.
• He described the eerie feeling of being lost in endless backrooms.