1 having a particular value (in money) 有某（金钱上的）价值: How much do you think that house is worth? 你认为那幢房子值多少钱？

2 worth doing, etc used as a way of recommending or advising （用于提出建议）值得做: That museum's well worth visiting if you have time. 有时间的话，那个博物馆很值得参观。The library closes in 5 minutes -- it's not worth going in. 图书馆再过5分钟就要关门，现在进去意义不大。

3 enjoyable or useful to do or have, even if it means extra cost, effort, etc 值得（即使要付出代价）: It takes a long time to walk to the top of the hill but it's worth the effort. 走到山顶要花很长时间，但还是值得努力一下。Don't bother cooking a big meal. It isn't worth it -- we're not hungry. 别费工夫弄太多吃的。实在没必要，我们也不饿。