1、词组look up为动词，意思有
1.查找、查阅
2.探望、拜访
3.抬头
4.好转、改善
5.敬仰、尊敬
2、”查找、查阅”意思时例句：
Many people have to look up the meaning of this word in the dictionary.
这个词的意思很多人都要查字典才知道。
3、意为”好转、改善”时例句：
At last things were beginning to look up.
情况终于开始好转了。
4、意为”抬头”时例句：
How many times must a man look up?
一个人要抬多少次头。
5、“探望、拜访”时例句：
I'll try to look him up, ask him a few questions.
我会设法登门拜访，问他几个问题。
6、意为“敬仰、尊敬”时例句：
The students all look up to the old philosophy teacher.
学生们都很尊敬那位哲学老教授。