1. （庞然大物或形状模糊之物）耸现，出现
    If something looms over you, it appears as a large or unclear shape, often in a frightening way.

    e.g. Vincent loomed over me, as pale and grey as a tombstone.
           文森特赫然耸现在我面前，面色灰白得像一块墓碑。
    e.g. ...the bleak mountains that loomed out of the blackness and towered around us.
           黑暗中若隐若现、耸立在我们四周的荒山

2. 迫近；逼近；即将爆发
    If a worrying or threatening situation or event is looming, it seems likely to happen soon.

    e.g. Another government spending crisis is looming in the United States...
           另一场政府开支危机在美国一触即发。
    e.g. The threat of renewed civil war looms ahead.
           内战战火重燃的威胁正迫在眉睫。

3. （尤指问题或忧虑）挥之不去，萦绕心中，显得突出
    If something, especially a problem or worry looms large, it occupies a lot of your thoughts and seems important.

    e.g. ...the terrible problem of armed crime now looming large in our society...
           已日渐成为我们当今社会一块心病的严重的持械犯罪问题
    e.g. As such tensions increase, they loom larger in Russia's domestic politics.
           这种紧张关系的不断加剧使其在俄罗斯国内政治中愈发凸显。

4. 织机；织布机
    A loom is a machine that is used for weaving thread into cloth.

相关词组：loom up