Answer the following Q with stream of consciousness. Context: The Christian cross, seen as a representation of the instrument of the crucifixion of Jesus, is the best-known symbol of Christianity. It is related to the crucifix (a cross that includes a usually three-dimensional representation of Jesus' body) and to the more general family of cross symbols.

Question: what is the meaning of the cross for christianity?
The relevant sentence in the passage is: The Christian cross, seen as a representation of the instrument of the crucifixion of Jesus, is the best-known symbol of Christianity. Therefore, the final answer is a representation of the instrument of the crucifixion of Jesus.