n.

1. 检查，调查[C][U][（+into/of）]
   A close examination of the butterfly showed that it had four wings.

   经过仔细观察发现这只蝴蝶有两对翅膀。

2. 考试[C][（+in/on）]
   The teacher gave us an examination in history.

   老师对我们进行了一次历史考试。

3. 审问；查问[U][C]
   The examination of all the witnesses took a week.

   对证人的讯问进行了一个星期。

n.

1. a detailed inspection or study.
   ▸the action of examining.
2. a formal test of knowledge or proficiency in a subject or skill.
3. Law  the formal questioning of a defendant or witness in court.