1. 嚴(yán)肅的;重要的;有意義的
    If you describe something as meaningful, you mean that it is serious, important, or useful in some way.

    e.g. She believes these talks will be the start of a constructive and meaningful dialogue...
           她認(rèn)為這些談話將是一次具有建設(shè)性的、有意義的對(duì)話的開(kāi)端。
    e.g. He asked people to tell him about a meaningful event or period in their lives.
           他讓人們講講他們生命中的重要事件或者階段。

2. （指眼神、姿勢(shì)）意味深長(zhǎng)的，意在言外的
    A meaningful look or gesture is one that is intended to express something, usually to a particular person, without anything being said.

    e.g. Upon the utterance of this word, Dan and Harry exchanged a quick, meaningful look.
           這句話一出口，丹和哈里馬上交換了一個(gè)意味深長(zhǎng)的眼神。

3. see also: meaningfully