1. 缺乏；不足；没有
    If there is a lack of something, there is not enough of it or it does not exist at all.

    e.g. Despite his lack of experience, he got the job...
           他虽然经验不足，但还是获得了这份工作。
    e.g. The charges were dropped for lack of evidence...
           指控因证据不足而被撤销。

2. 缺少；欠缺；没有
    If you say that someone or something lacks a particular quality or that a particular quality is lacking in them, you mean that they do not have any or enough of it.

lack的反义词

    e.g. It lacked the power of the Italian cars...
           它没有意大利轿车动力强劲。
    e.g. He lacked the judgment and political acumen for the post of chairman...
           他欠缺做主席应具备的判断力和政治敏锐度。

3. see also: lacking

4. 不乏；有的是
    If you say there is no lack of something, you are emphasizing that there is a great deal of it.

lack的反义词

    e.g. He said there was no lack of things for them to talk about...
           他说他们之间不缺谈资。
    e.g. President Clinton displayed no lack of vigor when he began to speak.
           克林顿总统开腔时颇有气势。