# supposition

> English word · Noun · IPA /ˌsʌpəˈzɪʃən/ · frequency rank #45,685

## Definitions
1. Something that is supposed; an assumption made to account for known facts, conjecture.
2. The act or an instance of supposing.

## Etymology
From Middle English supposicioun, from Anglo-Norman supposicion, from Latin suppositiō, suppositiōnem (“supposition”), from sub- (“under”) + positiō, positiōnem (“position; theme”), from positus (“position”), from the perfect passive participle of pōnō, pōnere (“put, place”).

## Easily confused with
- **superposition** (https://plainspell.com/en/vs/superposition-vs-supposition)

## Common misspellings (15)
`spuposition`, `ssupposition`, `supopsition`, `suposition`, `suppoistion`, `supposiiton`, `supposision`, `suppositino`, `suppositionn`, `suppositoin`, `supposittion`, `suppossition`, `suppostiion`, `suppsoition`, `uspposition`

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