1. the quality of being of great importance or significance

Examples

• The momentousness of the decision weighed heavily on her mind.
• He failed to grasp the momentousness of the historical event.
• The momentousness of graduation day was evident in everyone’s excitement.
• She spoke about the momentousness of the peace treaty.
• The momentousness of becoming a parent didn’t hit him until later.
• The ceremony captured the momentousness of the occasion perfectly.