WordNet sense 1 (a mark (`) placed above a vowel to indicate pronunciation):

grave accent

WordNet sense 2 (a place for the burial of a corpse (especially beneath the ground and marked by a tombstone)):

tomb

WordNet sense 3 (dignified and somber in manner or character and committed to keeping promises):

sedate, sober, solemn

WordNet sense 4 (concerned with work or important matters rather than play or trivialities):

serious

WordNet sense 5 (shape (a material like stone or wood) by whittling away at it):

sculpt, sculpture

WordNet sense 6 (of great gravity or crucial import; requiring serious thought):

grievous, heavy, weighty

WordNet sense 7 (of great significance or value):

important, of import

WordNet sense 8 (carve, cut, or etch into a material or surface):

engrave, inscribe, scratch

WordNet sense 9 (causing fear or anxiety by threatening great harm):

dangerous, life-threatening, severe

WordNet sense 10 (being in or verging on a state of crisis or emergency):

critical