1. 意味深长：Wonderful 多么美好 | Meaningful 意味深长 | Full Circle 周而复始
2. 意味深长的：meaning 意义 | meaningful 意味深长的 | meaningless 无意义的
1. 严肃的;重要的;有意义的
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...
她认为这些谈话将是一次具有建设性的、有意义的对话的开端。
e.g. He asked people to tell him about a meaningful event or period in their lives.
他让人们讲讲他们生命中的重要事件或者阶段。
2. （指眼神、姿势）意味深长的，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.
这句话一出口，丹和哈里马上交换了一个意味深长的眼神。
3. see also: meaningfully
adj
1. having a meaning or purpose
e.g. a meaningful explanation
a meaningful discussion
a meaningful pause