A Lesser Known Meaning

I ran across a definition of the word editor and thought it was interesting how the meaning had changed so dramatically.
In the days of gladiator games in Rome the sponsor/coordinator was called the editor. The editor would lead the combatants into the arena. The editor was usually the emperor or a high ranking magistrate. The first events were often mock fights with wooden weapons,followed by animal acts. Sometimes the animals were trained to perform tricks,but more often they were killed,the more common animals first progressing to the more exotic. The animals were sometimes pitted against each other,sometimes they were killed by a fighter called a bestiarii.
At lunch time they executed criminals. After lunch came the mortal combat of the gladiators. They would fight one-on-one or on teams. If one was injured or disarmed,he held up his left index finger,the spectators signaled with hand gestures whether they would be spared or put to death. Thumbs up for death,a fist waved for a reprieve. The editor made the final decision.