1. 墓穴；坟墓；埋葬处
    A grave is a place where a dead person is buried.

    e.g. They used to visit her grave twice a year.
           他们以前每年去她的墓前凭吊两次。

2. 死亡;终结
    You can refer to some-one's death as their grave or to death as the grave .

    e.g. ...drinking yourself to an early grave...
           纵酒而自折其寿
    e.g. Most men would rather go to the grave than own up to feelings of dependency.
           大多数男人宁死都不愿承认有依赖感。

3. 严重的；重大的；严峻的
    A grave event or situation is very serious, important, and worrying.

    e.g. He said that the situation in his country is very grave...
           他说他的国家情况十分危急。
    e.g. I have grave doubts that the documents tell the whole story.
           我对这些文件能否说明所有的问题深表怀疑。

4. 严肃的；表情沉重的
    A grave person is quiet and serious in their appearance or behaviour.

    e.g. William was up on the roof for some time and when he came down he looked grave...
           威廉在屋顶上呆了一段时间，他下来的时候面色凝重。
    e.g. Anxiously, she examined his unusually grave face.
           她忐忑不安地审视着他异常严肃的脸色。

5. . 重音符;抑音符;沉音符
    In some languages such as French, a grave accent is a symbol that is placed over a vowel in a word to show how the vowel is pronounced. For example, the word 'mère' has a grave accent over the first 'e'

6. 自掘坟墓；自取灭亡
    If you say that someone is digging their own grave, you are warning them that they are doing something foolish or dangerous that will cause their own failure.

    e.g. The magazine isn't trying to ruin his career, the man's digging his own grave by refusing an interview.
           这份杂志并非想断送他的事业，而他拒绝接受采访就是在自毁前程。

7. 九泉之下不得安宁
    If you say that someone who is dead would turn in their grave at something that is happening now, you mean that they would be very shocked or upset by it, if they were alive.

    e.g. Darwin must be turning in his grave at the thought of what is being perpetrated in his name.
           一想到冒他之名所做下的那些事，达尔文在九泉之下一定不得安宁。

8. from the cradle to the grave -> see cradle