important

significant, important, momentous

形容词 important:

1. of great significance or value
   同义词：of import
2. important in effect or meaning
   同义词：significant
3. of extreme importance; vital to the resolution of a crisis
   同义词：crucial
4. having authority or ascendancy or influence
   同义词：authoritative
5. having or suggesting a consciousness of high position

1. It was one of the most important discoveries ever made.
   这是所做出的最重大的发现之一。
2. He has made an important contribution to the company's success.
   他对公司的成功作出了重要的贡献。
3. It is important that he not do it.
   他不该做那事是有必要的。
4. History chronicles important events of the past.
   历史记载历代重要的事件。
5. Radio and television are important means of communication.
   无线电和电视是重要的通信手段。
6. It's very important to teach the children about road safety.
   把交通安全常识教给孩子们是非常重要的。
7. It's not as if he was very important in the company hierarchy.
   他在公司的领导层中似乎无多大权力。
8. She was clearly an important person.
   她显然是个有影响的人。

im.por.tant

adj.Abbr. imp.（形容词）缩写 imp.
Strongly affecting the course of events or the nature of things; significant:
重要的，有影响力的：强烈影响事件的进程或者事物的性质的；有特殊意义的：
例句：
an important message that must get through; close friends who are important to me.
必须传达的重要的消息；对我来说非常重要的亲密朋友

Having or suggesting a consciousness of high position or authority; authoritative:
显要的，权威的：感觉到或显示出高位或权威的；具有一种权威之神态的：
例句：
recited the decree with an important air.
以权威的姿态宣读法令

Obsolete Importunate.
【废语】 胡搅蛮缠的

来源：
Middle English
中古英语
from Old French
源自 古法语
from Medieval Latin import3ns important- [present participle of] import3re [to mean]
源自 中世纪拉丁语 import3ns important- [] import3re的现在分词 [表示…的意思]
from Latin [to import] * see import
源自 拉丁语 [具重要性] *参见 import

【引伸】
impor.tantly
adv.（副词）
Some critics have objected to the use of the phrasemore importantly in place of more important as a means of introducing an assertion, as inMore importantly, there is no party ready to step into the vacuum left by the Communists. But both forms are widely used by reputable writers,and there is no obvious reason for preferring one or the other.In an earlier surveythe introductory use ofmore importantly was acceptable to half of the members of the Usage Panel.
一些批评家已经对短语more importantly 作为表述一个断言的方法来代替短语 more important 提出反对意见， 如在句子更重要的是，没有政党准备进入共产党留下来的真空中去。 但是这两种形式都被有声望的作家广泛使用，并且没有明显的理由说哪个比哪个更好。在早期的调查中，more importantly 的引入使用对用法专题小组的半数成员来说是可以接受的