The answer depends on the point in the Dragon Ball timeline you are asking about. Nappa is killed early in Dragon Ball Z, but briefly reappears later.
Here's a breakdown:
-
Initial Death: Nappa is killed by Vegeta after being defeated by Goku during the Saiyan Saga. He is rendered unable to fight and Vegeta, deeming him useless, eliminates him without a second thought.
-
Resurrection and Fate in Hell: Although dead, Nappa remains in the afterlife, specifically in Hell, alongside other villains.
-
Brief Return: In Dragon Ball GT, Nappa is temporarily resurrected alongside other villains due to a dimensional rift created by Dr. Gero and Dr. Myuu. He is shown destroying a city.
-
Definitive State: Ultimately, Nappa is defeated again and presumably returns to Hell. He is never resurrected again after that point in the Dragon Ball canon.
Therefore, while Nappa is technically resurrected briefly, he is ultimately dead and remains that way.