To not think about something or someone, to fail to remember, or to disregard someone or something.
To follow, travel down (a particular way, course of action etc.).
To follow urgently, originally with intent to capture or harm; to chase.
To aim for, go after (a specified objective, situation etc.).
To participate in (an activity, business etc.); to practise, follow (a profession).
To act as a legal prosecutor.