1. 不在的；缺席的
    If someone or something is absent from a place or situation where they should be or where they usually are, they are not there.

    e.g. He has been absent from his desk for two weeks...
           他已经有两个星期没有坐在办公桌前了。
    e.g. The pictures, too, were absent from the walls...
           那些画也不在墙上了。

2. 出神的;心不在焉的
    If someone appears absent, they are not paying attention because they are thinking about something else.

    e.g. 'Nothing,' Rosie said in an absent way.
           “没什么，”罗茜心不在焉地说。

3. （父或母）不与子女一起住的
    An absent parent does not live with his or her children.

    e.g. ...absent fathers who fail to pay towards the costs of looking after their children.
           那些不在子女身边、未能支付抚养费的父亲

4. 使不在，使离开（本应在或通常在的地方）
    If someone absents themselves from a place where they should be or where they usually are, they do not go there or they do not stay there.

    e.g. She was old enough to absent herself from the lunch table if she chose...
           她长大了，可以自己做主不来吃午餐了。
    e.g. He pleaded guilty before a court martial to absenting himself without leave.
           在军事法庭上他对自己擅离职守表示服罪。

5. 若没有；假设没有
    If you say that absent one thing, another thing will happen, you mean that if the first thing does not happen, the second thing will happen.

    e.g. Absent a solution, people like Sue Godfrey will just keep on fighting.
           假如得不到解决，像休·戈弗雷这样的人就会一直坚持斗争下去。