mouser
Americannoun
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an animal that catches mice.
Our cat is a good mouser.
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a person or thing that seeks or prowls, as if for prey.
noun
Etymology
Origin of mouser
Middle English word dating back to 1350–1400; see origin at 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.
The UK's most famous feline, Larry the cat, marks 15 years as the country's chief mouser patrolling the corridors of power of 10 Downing Street.
From Barron's • Feb. 15, 2026
Meanwhile, the Foreign Office enlisted a chief mouser called Palmerston in 2016.
From BBC • Jun. 18, 2025
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 • Jun. 18, 2025
To me, he was the greatest cat ever, and the greatest mouser ever.
From Seattle Times • Jan. 13, 2023
My mother got rid of the vermin and he's a born mouser.
From "The Hunger Games" by Suzanne Collins
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.
