# backlash

> English word · Noun · IPA /ˈbækˌlæʃ/ · frequency rank #11,839

## Definitions
1. A suddenly reversed or backward motion, such as of a rope or elastic band when it snaps under tension.
2. A negative reaction, objection or outcry, especially of a violent or abrupt nature.
3. The looseness through which one part of connected machinery, such as a wheel, gear, piston, or screw, can be moved without moving the connected parts, or a measurement of the distance moved thereby; either intentional (as allowance) or unintentional (from error or wear).
4. The jarring or reflex motion caused in badly fitting machinery by irregularities in velocity or a reverse of motion.

## Etymology
From back- + lash.

## Common misspellings (13)
`abcklash`, `baccklash`, `backalsh`, `backklash`, `backlahs`, `backlashh`, `backlassh`, `backllash`, `backlsah`, `baclkash`, `bakclash`, `bbacklash`, `bcaklash`

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