# out-of-band

> English word · Adjective

## Definitions
1. Relating to activity outside of a defined telecommunications frequency band.
2. Relating to communication on a different channel, or by a different method, from that of the primary communication channel.
3. Relating to communication, such as identity verification, via a method other than the primary means of accessing the software.
4. Referring to a value returned by a function that is not in its natural range of return values, but rather signals an exception.

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