1. 大约的；大概的
    An approximate number, time, or position is close to the correct number, time, or position, but is not exact.

approximate在线翻译

    e.g. The approximate cost varies from around £150 to £250...
           费用大概介于150至250英镑之间。
    e.g. The times are approximate only.
           这些只是大致的时间。

2. 近似的；粗略的
    An idea or description that is approximate is not intended to be precise or accurate, but to give some indication of what something is like.

    e.g. They did not have even an approximate idea what the Germans really wanted.
           他们完全不清楚德国人真正想要什么。

3. 近似于
    If something approximates to something else, it is similar to it but is not exactly the same.

approximate什么意思

    e.g. Something approximating to a fair outcome will be ensured...
           保证会有大致公正的结果。
    e.g. By about 6 weeks of age, most babies begin to show something approximating a day/night sleeping pattern.
           到6个星期大时，大多数婴儿开始表现出近似于日夜分明的睡觉模式。