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Added 9 October 2026

momentous

/məʊˈmɛn.təs/ adjective

In Latin: magnus Wiktionary

adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about momentous at Wordnik → Where our words come from →

Of very great significance.
deciding to drop the atom bomb was a very big decision

Origin

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

From Wiktionary, via Kaikki.org (CC BY-SA)

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