If you feel settled in a job, school, etc., you have become familiar with it and are comfortable and happy there.

Now that the children are settled at school, we don't really want to move again. 孩子们已经在学校里安定下来，我们确实不太想再搬家了。

Although I worked there for over a year, I never really felt settled. 虽然我在那里已经工作一年多了，但我从未觉得真正安定下来。

living somewhere, especially permanently

After many years of travelling around, we're now enjoying a more settled life. 多年游历之后，我们现在享受着一种较为稳定的生活。

Settled weather is calm and unlikely to change.

It looks as if we are in for a settled spell this week. 看来这个星期天气似乎会比较稳定。