1. the quality or state of being serious, solemn, or weighty in manner or appearance
2. the quality or state of being serious or severe in nature or consequence; importance or significance

Examples

• The graveness of her expression told us she had bad news.
• He spoke with such graveness that everyone fell silent.
• The graveness of the situation required immediate action.
• Despite the graveness of the diagnosis, she remained hopeful.
• The judge's graveness commanded respect in the courtroom.
• We could not ignore the graveness of the threat.
• Her graveness contrasted sharply with her usual cheerful demeanor.