Crown Heights Borders?

What defines Crown Heights geographically speaking? I have found that Atlantic and Washington are two borders, but the other two I am not sure about. I have found varying information. Anyone know what the official word is on this?

no real official anything in nyc. neighborhoods expand and contracts all the time!

Currently, it is Atlantic to Empire and Washington to Utica (or thereabouts). Everything north of EP is Crown Heights North. But, as armchair said this is pretty fluid. When I was a kid, where I live now (which is in Crown Heights North) was considered to be Bed-Stuy.