1 to surround a place with an army 以军队包围

2 (usually passive 通常用于被动语态) (used about sth unpleasant or annoying) to surround sb/sth in large numbers （指令人不快或心烦的事）拥在…周围，围住: The actor was besieged by fans and reporters. 那位演员被仰慕者和记者围住。