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mouser

American  
[mou-zer] / ˈmaʊ zər /

noun

  1. an animal that catches mice: mouse.

    Our cat is a good mouser.

  2. a person or thing that seeks or prowls, as if for prey.

mouser British  
/ ˈmaʊsə, ˈmaʊzə /

noun

  1. a cat or other animal that is used to catch mice: usually qualified

    a good mouser
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of mouser

Middle English word dating back to 1350–1400; mouse, -er 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Larry the cat already serves as 10 Downing Street's chief mouser but there are no plans to introduce pets to tackle the pest problem in the Palace of Westminster down the road.

From BBC

A number of you also have had the great joy of having the greatest cat ever and the greatest mouser ever.

From Seattle Times

To me, he was the greatest cat ever, and the greatest mouser ever.

From Seattle Times

In subsequent years, he was given the exalted title of chief mouser to the Cabinet Office, a post he has carried out with mixed results, depending on who is passing judgment.

From New York Times

“There’s a new electronic mouser on the market,” he volunteered.

From Literature

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.