What is the meaning of offstage?

noun

• A stage area out of sight of the audience.
  • synonyms: wing, backstage

adjective

• Situated or taking place in the area of a stage not visible to the audience.
  • usage: "offstage noises"
• Concealed from public view or attention.
  • usage: "offstage political meetings"
  • synonyms: backstage

adverb

• Behind the scenes; not on stage.
  • usage: "the actors were waiting offstage"
• Not in public.
  • usage: "the deal was done offstage"