\ 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

Keep scrolling for more

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
See More
Recent Examples on the Web: Noun Anstead then removes a tiny mouse from the car, holding it up for the camera and a less-than-enthused Marsden. Nicholas Rice,, 30 Aug. 2021 And Don Johnson shall rise to the top like a fine mouse running in the cream. Derek Lawrence,, 23 Aug. 2021 Essentially, all a user would need to do is attach a Razer mouse, wait for Razer’s utility software to download, and then run PowerShell. Mark Hachman, PCWorld, 23 Aug. 2021 Every detail mattered to you, from a sly look on a tiny mouse to the nails hammered into Santa’s sleigh. Sarah Schutte, National Review, 22 Aug. 2021 But a new study suggests that interacting with digital, three-dimensional models—a set of virtual heads that can be manipulated with a computer mouse—could make eyewitness evidence more accurate. Sophie Bushwick, Scientific American, 10 Aug. 2021 The models are cross platform and can be navigated with a mouse, VR headset or mobile phone, or anything with a browser. Charlie Fink, Forbes, 7 July 2021 Navigate your Mac easier with this wireless mouse that has been refurbished and is in good condition. Popular Science, 5 Mar. 2021 Navigating on a computer with a traditional mouse never came easily for 8-year-old Isabelle Dapkus, who has developmental disabilities. Ariana Taylor, Star Tribune, 18 Oct. 2020 Recent Examples on the Web: Verb 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 Most mammals at the time were closer to mouse-sized, while dinosaurs dominated the landscape. Theresa Machemer, Smithsonian Magazine, 1 May 2020 Some companies like Just are working on growing familiar meats like turkey, pork, chicken and beef, while others are working on exotic options like foie gras, bluefin tuna and even mouse meat for pet food. Jenny Splitter / Photography Kelsey Mcclellan, Popular Mechanics, 20 Dec. 2019

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.

See More

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

Keep scrolling for more

Learn More About mouse

Time Traveler for mouse

Time Traveler

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

See more words from the same century

Dictionary Entries Near mouse




See More Nearby Entries 

Statistics for mouse

Last Updated

12 Sep 2021

Cite this Entry

“Mouse.” Dictionary, Merriam-Webster, Accessed 17 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

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


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Spell It

Can you spell these 10 commonly misspelled words?

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!