what does "settle down" means?

Settle down either means to establish oneself (as settle down in a new neighborhood, or settle down into a career), or, it means to behave properly (Mother might say: "You kids settle down, or i'll have to punish you.")

does "settle down" has have a lot of meaning?

Many chinese students post poor thread titles. yours is an excellent example of a good thread title.

your sentence and spelling are all ecellent.

Well done!

Thanks for that.

usually i heard the word "settle down" from someone who is ready for a comitted relationship, other than relationship, never heard the term "settle down".

like the other poster said, it can be used in career too, now i know...thanks.