What do you mean when you say you feel "grounded?"?

I was writing about this, thinking that “grounded” meant being centered in our notions of reality. But where does that notion of reality come from? Is it our history? If it’s in our history, does that mean it will probably be in our future? Is a cynical view of reality the “grounded” view? Can “grounding” be idealistic?

Have you ever felt grounded? How did you get to that place?