1. (军队或警察对某地的)围困，包围，围攻
    A siege is a military or police operation in which soldiers or police surround a place in order to force the people there to come out or give up control of the place.

    e.g. We must do everything possible to lift the siege...
           我们必须尽一切可能解除包围。
    e.g. They are hopeful of bringing the siege to a peaceful conclusion...
           他们希望能和平结束这次围困。

2. (警察、士兵、新闻记者等)包围，围住
    If police, soldiers, or journalists lay siege to a place, they surround it in order to force the people there to come out or give up control of the place.

    e.g. The rebels laid siege to the governor's residence...
           叛乱者包围了总督府。
    e.g. The press laid siege to the club.
           记者围住了俱乐部。

3. 遭受严厉批评;承受巨大压力
    If someone or something is under siege, they are being severely criticized or put under a great deal of pressure.

    e.g. The guy'll think he's under siege...
           那家伙会认为他承受了巨大压力。
    e.g. Radio One is under siege from all sides.
           广播一台受到了来自各方的严厉批评。