# fifth force

> English word · Noun

## Definitions
1. A hypothetical fundamental force, distinct from gravity, electromagnetism, and the strong force and weak force, proposed to explain various anomalous observations that do not fit existing theories.

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