英汉词典

1. 无知的;愚昧的;(对…)不知情的
    If you describe someone as ignorant, you mean that they do not know things they should know. If someone is ignorant of a fact, they do not know it.

    e.g. People don't like to ask questions for fear of appearing ignorant...
           人们不喜欢问问题,害怕自己会显得很无知。
    e.g. Many people are worryingly ignorant of the facts about global warming.
           许多人竟然不知道地球变暖的事实,实在令人担忧。

2. 无礼的,粗鲁的(一些人认为用该词表达此义欠妥)
    People are sometimes described as ignorant when they do something that is not polite or kind. Some people think that it is not correct to use ignorant with this meaning.

    e.g. I met some very ignorant people who called me all kinds of names.
           我碰到了一些非常粗鲁的家伙,他们用各种脏话骂我。