Momentous

//moʊˈmɛn.təs// adj

adj ·Moderate ·College level

Definitions

Adjective
  1. 1
    Outstanding in importance, of great consequence.

    "The reason why I did not publish this book till the end of the last sessions of parliament was, because I did not care to interfere with more momentous affairs."

Adjective
  1. 1
    of very great significance wordnet

Synonyms

All synonyms
significantabsoluteascendantauthoritarianauthoritativeauthorized

Example

More examples

"The discovery will have a momentous effect on the treatment of cancer."

Etymology

From moment (“weight, importance”) + -ous.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.