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.
Other high-profile Westminster pets include Downing Street's chief mouser, Larry the cat, and his Foreign Office counterpart Palmerston, who died in February after retiring to Bermuda.
From BBC ● May 22, 2026
Larry the cat, the UK's most famous feline, marks 15 years on Sunday as the country's chief mouser patrolling the corridors of power around number 10 Downing Street.
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
To me, he was the greatest cat ever, and the greatest mouser ever.
From Seattle Times ● Jan. 13, 2023
That new electronic mouser that made a noise only mice could hear and sent them screaming into the night?
From "Ralph S. Mouse" by Beverly Cleary
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.
