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Definition of momentous

momentous

/moʊˈmɛn.təs/
mo · men · tous
Adverb:momentously
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momentous Lexical Profile

momentous Game Scores & Validity

• adjective

1

Of great or far-reaching importance, significance, or consequence, especially regarding the future (used of a decision, event, or change).

Example

"The signing of the peace treaty was a momentous occasion that reshaped the political landscape of the entire region."

Synonyms
View all synonyms for momentous
Antonyms
View all antonyms for momentous

Word Nuance & Usage

Do not confuse 'momentous' (of great importance or consequence) with 'momentary' (lasting for only a brief moment).

• Rhymes for momentous

• Nearby Words

moment
momentarily
momentary
momentous
momentously
momentum
mommy

Word Origin & Etymology

Coined in the mid-17th century from the Latin 'momentum' (meaning 'movement', 'moving power', or 'weighty importance', contracted from 'movimentum', from 'movere', 'to move') combined with the suffix '-ous'.

Cite this Entry

Wordmom. (2026). Definition of Momentous. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/momentous
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