形容词

1. 适宜的；合适的；适当的；恰当的
You use proper to describe things that you consider to be real and satisfactory rather than inadequate in some way.

2. 正确的；准确的；最合适的
The proper thing is the one that is correct or most suitable.

3. 得体的；合乎体统的；正派的
If you say that a way of behaving is proper, you mean that it is considered socially acceptable and right.

4. 严格意义上的；真正的；本身的
You can add proper after a word to indicate that you are referring to the central and most important part of a place, event, or object and want to distinguish it from other things which are not regarded as being important or central to it.

1. appropriate for a condition or purpose or occasion or a person's character, needs

e.g. everything in its proper place
the right man for the job
she is not suitable for the position

Synonym: right

2. marked by suitability or rightness or appropriateness

e.g. proper medical treatment
proper manners