Momentous

/məˈmɛn.təs/

Meaning & Definition

adjective
of great importance or significance, especially in having a bearing on future events.
The signing of the peace treaty was a momentous occasion in the history of the two countries.
having far-reaching consequences; of critical importance.
Her momentous decision to pursue a career in medicine changed the course of her life.
lacking triviality; of considerable magnitude.
The momentous discovery of a new species of plant excited the entire scientific community.

Etymology

Originated from the Latin word 'momentosus', meaning significant.

Common Phrases and Expressions

momentous occasion
An event that is significant or important.
a momentous decision
A decision of great importance.
momentous change
A significant or transformative change.

Related Words

moment
A brief period of time; a particular point in time.
importance
The state or fact of being of great significance or value.

Slang Meanings

A big deal.
Graduating from college is a momentous moment, or as we like to say, a big deal!
A game-changer.
That new policy was a momentous shift in how things are done; definitely a game-changer!