Is it safe to eat from fork that dropped on ground? either outside or indoors.

Usually, however...: In most cases eating from a fork dropped on the ground won't cause any problems. The concern is it might become contaminated with bacteria that could make you ill but our stomach acid kills most bacteria and the odds of the fork coming in contact with enough dangerous bacteria to make you ill are quite remote. But it's theoretically possible that it could make you ill so wash (or wipe) if you can.