Definition of grave:
of great weight; heavy; ponderous; of importance; momentous; weighty; influential; sedate; serious; said of character, relations, etc.; as, grave deportment, character, influence, etc
"his shield grave and great. --Chapman."
an accent used in French, Italian and other languages. ? is an e with a grave accent; an excavation in the earth as a place of burial; also, any place of interment; a tomb; a sepulcher. Hence
"he had lain in the grave four days. --John XI
to dig. (Obs.
) Chaucer; to carve or cut, as letters or figures, on some hard substance; to engrave
"he hath graven and digged up a pit. --Ps.
VII 16 (Book of Prayer)."