# mouser

> English word · Noun · IPA /ˈmaʊzə(ɹ)/ · frequency rank #83,535

## Definitions
1. A cat that catches mice, kept specifically for the purpose.
2. A moustache.

## Etymology
From Middle English mousere (“a hunter of mice”), equivalent to mouse + -er (agent noun suffix) or + -er (occupational suffix). The “moustache” sense is apparently an extended usage (i.e., a cat’s whiskers, jocularly transferred to human beings), possibly with influence from moustache.

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