noun
cross; cross shape
General term for a cross shape, including the symbol, an intersection, or a cruciform object.
地図の上に十字を描いてください。
Please draw a cross on the map.
その教会の屋根には大きな十字が立っている。
A large cross stands on the roof of that church.
noun
sign of the cross
Specifically the Christian gesture of making the sign of the cross.
彼は祈りの前に十字を切った。
He made the sign of the cross before praying.