1. in a way that is of great importance or significance; with far-reaching consequences

Examples

• The president spoke momentously about the nation’s future.
• She paused momentously before announcing her decision.
• The discovery would momentously change our understanding of physics.
• He nodded momentously, understanding the weight of his responsibility.
• The treaty was signed momentously in the historic hall.
• The judge delivered the verdict momentously to the packed courtroom.