Meaning of “grave” - Learner’s Dictionary

grave

noun [ C ] us uk /ɡreɪv/
an unmarked graveThey lowered the coffin into the grave.He laid flowers at her grave.The victims were buried in mass graves.The girl's body was found in a shallow grave.

B2 a place in the ground where a dead body is buried:

She visits his grave every day.

(Definition of “grave noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)