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'.
(..) across the Himalayas. For some, it will be their last. The golden eagles have been expecting them. The eagles work in pairs to separate a young crane from the flock. It escapes the touches of one, and is caught by another. But even a young crane is a heavy prize and the eagle has (..)2006 TvShow: Planet Earth Title: Mountains Season: 1 Episode 2