# Faraday bag

> English word · Noun

## Definitions
1. A bag made of a material that blocks electromagnetic signals, and employing special sewing techniques such as dual paired seam construction, used to hold devices such as cell phones in order to prevent outside signals from interfering with the contents of the device.

## Etymology
Named after Michael Faraday.

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