Skip to the word

Added 4 October 2026

assertion

/əˈsɜːʃən/ noun

Latin root: assertiō Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about assertion at Wordnik → Where our words come from →

The act of asserting; positive declaration or averment.
Something which is asserted; a declaration; a statement asserted.
You're a man of strong assertions!
A statement or declaration which lacks support or evidence.
That's just a bare assertion.

Origin

From Middle English assercioun, from Latin assertiō. By surface analysis, assert + -ion.

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

Back to today's word