# MSL

> English word · Noun · frequency rank #54,953

## Definitions
1. Initialism of mean sea level.
2. Initialism of maritime/marine security, large; a type of cutter or (sovereignty, freedom-of-navigation, surveillance/reconnaissance) patrol vessel/craft/boat/ship.

## Etymology
Abbreviation.

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