To take further actions remaining after an event; to continue, revisit, or persist; especially, to maintain communication or verify.
To aim for, go after (a specified objective, situation etc.).
To follow, travel down (a particular way, course of action etc.).
To follow urgently, originally with intent to capture or harm; to chase.
To participate in (an activity, business etc.); to practise, follow (a profession).
To act as a legal prosecutor.