# backflash

> English word · Noun

## Definitions
1. The hazardous situation where the flame propagates backward down the hose of an oxyfuel welding and cutting system.
2. Synonym of flashback (“dramatic device”).

## Etymology
From back + flash.

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