General term for a burial ground. Often used in set phrases like 墓場まで持っていく (take a secret to the grave).
He was buried in the graveyard of his hometown.
The graveyard was very quiet at night.
I intend to take that secret to the grave.
My grandfather rests in this graveyard.
墓 means an individual grave or tombstone, while 墓場 refers to the whole graveyard or burial ground containing many graves.
Compound of 墓 (haka, 'grave') and 場 (ba, 'place').