Momentous

Definition

Momentous means of great historical or epoch‑defining importance, a turning point. Weighty, by contrast, means carrying substantial intellectual or moral gravity, not necessarily historic. So, momentous focuses on world‑changing, historic events. Weighty focuses on seriousness and the need for careful consideration.

What it describes

A country has been divided by a wall for decades. Families have been separated, and travel has been forbidden. Then, one evening, a government official announces that the wall will be opened immediately. Thousands of people rush to the border, crying and cheering. News channels around the world broadcast the scene live. Nothing will ever be the same again. What kind of event is the opening of the wall? It is a momentous event.

Examples in context

• The signing of the peace treaty was a momentous occasion for both nations.
• Her decision to resign was momentous, affecting thousands of employees.