He tries to keep his private life and public life 'separate' (from each other). = He tries to keep his private life 'separate' from his public life.
('US') He fell and 'separated' [='dislocated'] his shoulder. [=caused the bone in his shoulder to move out of its proper position]
The competition has been easy to this point, but now it gets tough and we'll really begin to 'separate the men from the boys'.
(..) I'll do it myself. What's the big surprise? Oh. Curtain. Yeah. I put this in so we can maintain our separate zones. What if I want to come see my stuff? That's the best part. It's all back in your closet. So, cool. (..)2010 TvShow: Scrubs Title: Our Thanks Season: 9 Episode 13