1. 三个的;三方的;三部分的
    Triple means consisting of three things or parts.

    e.g. ...a triple somersault...
           空翻三周
    e.g. In 1882 Germany, Austria, and Italy formed the Triple Alliance.
           1882 年，德国、奥地利和意大利结成了三国同盟。

2. (使)变成三倍;(使)增至三倍
    If something triples or if you triple it, it becomes three times as large in size or number.

    e.g. I got a fantastic new job and my salary tripled...
           我得到了一份非常好的新工作，薪水涨到了原来的 3 倍。
    e.g. The Exhibition has tripled in size from last year...
           展览会规模自去年已经扩至3倍。

3. 是…的三倍
    If something is triple the amount or size of another thing, it is three times as large.

triple的近义词

    e.g. The mine reportedly had an accident rate triple the national average...
           据报道,该矿事故发生率是全国平均水平的 3 倍。
    e.g. The kitchen is triple the size it once was.
           厨房面积扩为原先的 3 倍。