# MSB

> English word · Noun · frequency rank #77,942

## Definitions
1. Initialism of most significant bit.
2. Initialism of most significant byte.
3. Initialism of main switchboard.
4. Initialism of money services business.

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