\ ˈmau̇s How to pronounce mouse (audio) \
plural mice\ ˈmīs How to pronounce mouse (audio) \

Definition of mouse

 (Entry 1 of 2)

1 : any of numerous small rodents (as of the genus Mus) with pointed snout, rather small ears, elongated body, and slender tail
2 plural also mouses : a small mobile manual device that controls movement of the cursor and selection of functions on a computer display
3 : a timid person
4 : a dark-colored swelling caused by a blow specifically : black eye


\ ˈmau̇z How to pronounce mouse (audio) \
moused; mousing

Definition of mouse (Entry 2 of 2)

intransitive verb

1 : to hunt for mice
2 : to search or move stealthily or slowly

transitive verb

1 : to search for carefully usually used with out
2 obsolete
a : bite, gnaw
b : to toy with roughly
mouse over
: to use a mouse to position a cursor over (a specific location or element on a computer screen) without clicking the mouse's button Rich media is pretty much anything that moves when you interact with it. It can be a Flash animation, or a streaming video clip, or an image rotator that changes when you mouse over it.— Ariel Bleicher

Examples of mouse in a Sentence

Noun The house was infested with mice and rats. He moved the mouse to click on the icon. Verb a cat mousing along in the shadows of the garden
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Recent Examples on the Web: Noun But go ahead and get your Santa hats, mouse ears, and Gryffindor robes out of storage. Arthur Levine, USA TODAY, 2 Dec. 2021 Target, Amazon Reviews editor Julian Chokkattu has used this mouse for several years and included it in our Work From Home guide. Wired, 29 Nov. 2021 Sensors that resemble electronic mouse traps, deployed throughout the building, that trigger alarms when wet. New York Times, 25 Nov. 2021 Many pointed to what looked like a mouse cursor in the second line of the email, arguing that suggested the email was still being composed, and hadn’t been actually sent. Jane Li, Quartz, 19 Nov. 2021 For a study published in 2018, a group of scientists in Moscow, Idaho, squirted a common-cold-type virus, either a rhinovirus or a mouse coronavirus, up the noses of white mice. Roxanne Khamsi, The Atlantic, 17 Nov. 2021 And some companies, including Amazon, have considered monitoring workers’ mouse movements and keyboard strokes as a way to detect impostors. Washington Post, 10 Nov. 2021 Mouse Utilities is a great one for people who use multiple screens and can’t find their mouse cursor. Barry Collins, Forbes, 6 Nov. 2021 Basilisk Ultimate gaming mouse is one of our favorites. Medea Giordano, Wired, 1 Nov. 2021 Recent Examples on the Web: Verb Volume and mute are easy to access without having to mouse over to your video application. Zane Pickett, Forbes, 28 Oct. 2021 The viewer can mouse over each element and read a brief description, and then perhaps click a link to access more details. Expert Panel®, Forbes, 11 Oct. 2021 At the end of a long day of video calls and Slack messages, workers unable or unwilling to meet up at the bar can mouse over to another tab for some virtual socialization on apps such as Discord and Clubhouse. Brian Contreras, Los Angeles Times, 5 Aug. 2021 Zoom in on the map to find individual restaurants and mouse over locations to access the latest state inspection reports. Orlando Sentinel Staff,, 26 Mar. 2021 In what will be the office of incoming press secretary Jen Psaki, a computer keyboard and mouse on her desk were encased in plastic. The Associated Press,, 20 Jan. 2021 Nonadjustable armrest height and width means this chair won't support keyboard and mouse hands properly for many, if not most, people. Jim Salter, Ars Technica, 1 Dec. 2020 To figure out how cells do this, researchers tested two known for going the distance—a soil-dwelling amoeba (Dictyostelium discoideum) and mouse pancreatic cancer cells. Lucy Hicks, Science | AAAS, 27 Aug. 2020 On some dashboards, the line graphs have each data point or segment labeled, but the graph is so small that the labels bleed together, forcing the user to mouse over each pinpoint dot on the graph to find precise info. Brian Feldman,, 14 May 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mouse.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mouse


before the 12th century, in the meaning defined at sense 1


13th century, in the meaning defined at intransitive sense 1

History and Etymology for mouse


Middle English, from Old English mūs; akin to Old High German mūs mouse, Latin mus, Greek mys mouse, muscle

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Time Traveler for mouse

Time Traveler

The first known use of mouse was before the 12th century

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Statistics for mouse

Last Updated

5 Dec 2021

Cite this Entry

“Mouse.” Dictionary, Merriam-Webster, Accessed 6 Dec. 2021.

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More Definitions for mouse



English Language Learners Definition of mouse

: a very small animal that has a pointed nose and a long, thin tail
: a small device that is connected to a computer and that you move with your hand to control the movement of a pointer on the computer screen


\ ˈmau̇s How to pronounce mouse (audio) \
plural mice\ ˈmīs \

Kids Definition of mouse

1 : a very small furry gnawing animal that is a rodent with a pointed snout and long slender tail
2 : a person without spirit or courage
3 plural also mouses : a small movable device that is connected to a computer and used to move the cursor and select functions on the screen

Other Words from mouse

mouselike \ ˈmau̇s-​ˌlīk \ adjective


\ ˈmau̇s How to pronounce mouse (audio) \
plural mice\ ˈmīs How to pronounce mouse (audio) \

Medical Definition of mouse

1 : any of numerous small rodents with pointed snout, rather small ears, elongated body, and slender hairless or sparsely haired tail, including all the smaller members of the genus Mus (as the medically significant house mouse, M. musculus) and many members of other rodent genera and families having little more in common than their relatively small size
2 : a dark-colored swelling caused by a blow specifically : black eye

More from Merriam-Webster on mouse

Nglish: Translation of mouse for Spanish Speakers

Britannica English: Translation of mouse for Arabic Speakers Encyclopedia article about mouse


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