# defeater

> English word · Noun · IPA /dɪˈfiːtə(ɹ)/

## Definitions
1. One who defeats.
2. a belief which, if proved to be true, would imply outright or indirectly that another belief were false.

## Etymology
From defeat + -er.

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