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.
On Saturday came sad news that Palmerston, a black-and-white cat, once mouser to the Foreign Office and "Diplocat extraordinaire", had passed away in Bermuda where he retired in 2020.
From Barron's • Feb. 15, 2026
Leading tributes to Palmerston was his former rival, Number 10's chief mouser, Larry who this weekend celebrates 15 years in post - having served under six prime ministers.
From BBC • Feb. 14, 2026
A number of you also have had the great joy of having the greatest cat ever and the greatest mouser ever.
From Seattle Times • Mar. 3, 2023
He also developed an antagonistic relationship with the Foreign Office’s own mouser, Palmerston, who has since retired from public duty.
From New York Times • Sep. 6, 2022
Or get bottle-fed, if you’re a small blind kitten with a white dot between your eyes that only needs a little extra love to become a pouncing, lively mouser.
From "The Wrong Way Home" by Kate O’Shaughnessy
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.
