Where is Home?

There are some things I don't understand. Where is Home? Not the house we live in at the moment, or maybe not the last place we lived. Is it the house that we grew up in? How does one get back home? We all need a centering place to return to. A feeling of being displaced is common when we travel for business or pleasure. But, how does one get home if they are already where they live?

Is home defined by others and where they are? Can home be something that doesn't exist if the ones we love are not there anymore? As one ages, do pieces of home leave?