What does the word outer mean?

Usage examples for outer

  1. Rewa Gunga met you in the dark, beyond those outer curtains, did he not? – King--of the Khyber Rifles by Talbot Mundy
  2. For fear of breaking the spell, I did not dare cross the room to close Beulah's door or to reach the outer door of my office, which was nearer hers than it was to my desk. – Friday, the Thirteenth by Thomas W. Lawson