Resurrection means coming back to life after death, and in stories it's usually associated with some kind of magical power. In the Bible, Jesus was the first person to have a body of resurrection. This means that after Jesus died, he was brought back to life again after three days, and his body didn't stay dead. This was seen as a miracle because no one had ever been able to do this before. Jesus' resurrection is seen as an important event for Christianity, because it shows that Jesus is powerful, and that his death has meaning.