backstage

nouns

a stage area out of sight of the audience
backstage, offstage, wing

adjectives

concealed from public view or attention
"offstage political meetings"
backstage, offstage

adverbs

out of view of the public; behind the scenes
"Working backstage to gain political support for his proposal"; "many private deals were made backstage at the convention"
backstage
in or to a backstage area of a theater
"costumes were changed backstage"
backstage