to surround a place, especially with an army, to prevent people or supplies getting in or out

The town had been besieged for two months but still resisted the aggressors. 该城虽已被围困了两个月，但仍然把侵略者拒之城外。

When someone is besieged, a lot of people surround them.

When the pop star tried to leave her hotel, she was besieged by waiting journalists and fans. 那名流行歌星试图离开酒店时，被一群等候在外的记者和歌迷围住了。

to make many requests or complaints about something

After showing the controversial documentary, the channel was besieged with phone calls from angry viewers. 在播放了一部有争议的纪录片之后，这家电视台就不断收到愤怒的观众的电话。