[adjective], [adverb] - in the area behind the stage in a theatre, esp. the rooms in which actors change their clothes or where equipment is keptWe went backstage after the show to meet the actors.For backstage workers, the week before the Festival is the busiest of all.(figurative) The organizers say it's a fair contest but who knows what goes on backstage (= where the public cannot see)?(figurative) The unions were involved in backstage (= secret) negotiations with the management.
BACKSTAGE
Meaning of BACKSTAGE in English
Cambridge English vocab. Кембриджский английский словарь. 2012