# assertion

> English word · Noun · IPA /əˈsɜːʃən/ · frequency rank #12,366

## Definitions
1. The act of asserting; positive declaration or averment.
2. Something which is asserted; a declaration; a statement asserted.
3. A statement or declaration which lacks support or evidence.
4. Maintenance; vindication.
5. A statement in a program asserting a condition expected to be true at a particular point, used in debugging.
6. The set of information that the statement preparer is providing in a financial statement audit.

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

## Easily confused with
- **assertive** (https://plainspell.com/en/vs/assertion-vs-assertive)
- **asserting** (https://plainspell.com/en/vs/asserting-vs-assertion)

## Common misspellings (12)
`asertion`, `asesrtion`, `asseriton`, `asserrtion`, `assersion`, `assertino`, `assertionn`, `assertoin`, `asserttion`, `assetrion`, `assretion`, `sasertion`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/assertion