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'.
(..) And my ax. You carry the fates of us all,little one. If this is indeed the will of the Council... ...then Gondor will see it done. -Frodo's not going anywhere without me. -lt is hardly possible to separate you... ...even when he is summoned to a secret Council and you are not. We're coming too! (..)2001 The Lord of the Rings: The Fellowship of the Ring
(..) Only use the mimolette cheese. Whoa! Compose the salad like you were painting a picture. Not too much vinaigrette on that salade compos'e. Don't let that beurre blanc separate. Keep whisking. Gently poach the scallops. Taste check. Spoons down. Good. Too much salt. Good. Don't boil the consomm', (..)2007 Ratatouille
(..) yourself. Not your girlfriend, your mom, or me. you be surprised how many girls Sheena as knocking at your door. Great. #You have to find a way to separate you from the pack. You excel at something, you know? And there you can choose what you want herd when you advanced ... #start to sniff. (..)2014 Boyhood