mouse
- 1A small rodent with a pointed snout, rounded ears and a long thin tail; also any similar small animal.
A mouse had been nibbling at the seeds stored in the shed.
A gray house mouse darted across the kitchen floor and vanished under the refrigerator.
UsageThe plural is mice: two mice (not
incorrect: two mouses).Note
In science writing this is the laboratory animal, as in Sandee LaMotte's 2022 report on David Sinclair's lab at Harvard Medical School, where old mice are growing young again.
Checked 2 Nov 2026 · 2 facts
- Sandee LaMotte published the referenced report in 2022. abc17news.com
- The report describes old mice growing young again in David Sinclair’s laboratory at Harvard Medical School. abc17news.com
- 2A small hand-held device moved on a flat surface to control a pointer on a computer screen; also loosely the pointer itself.
He replaced his worn-out mouse with a quieter wireless model.
A responsive mouse makes detailed photo editing far less frustrating.
UsagePlural most often mice, sometimes mouses. In careful writing the arrow on screen is the pointer or cursor.
- 3To navigate on a computer by means of a mouse.
Users mouse through the nested menus to find the setting they need.
She moused across the toolbar, hunting for the crop tool.
UsageMostly with a direction word: mouse over an icon, mouse to the File menu.
Note
MacUser in 1988 describes someone who had just moused to the File menu, and Daniel Tunkelang's Faceted Search (2009) speaks of mousing over facet elements. The pattern mouse over is the one that stuck, naming the act of hovering the pointer over something without clicking.
Checked 2 Nov 2026 · 3 facts
- MacUser contains the File-menu example in volume 4, dated 1988. en.wiktionary.org
- Daniel Tunkelang wrote Faceted Search, first published in 2009. link.springer.com
- Faceted Search uses the phrase mousing over facet elements. en.wiktionary.org
Less common meanings
- 4A timid, quiet, or shy person.
She seemed a mouse at first, but proved fearless once the pressure was on.
The new intern was a complete mouse during the morning meetings.
Similarwallflower
- 5
- 6Of a cat, to hunt or catch mice.
Barn cats mouse through the winter to keep the rodent population down.
A cat that will not mouse is of little use on a working farm.
UsageOften in go mousing: the cat went mousing in the barn.
Note
One of the oldest jobs the word does, in use since the twelfth century. Because the subject is almost always a cat, a sentence like the cat will not mouse judges its usefulness as much as its habits.
Checked 2 Nov 2026 · 1 fact
- The hunting sense of mouse dates to the twelfth century. en.wiktionary.org
- 7A swelling or bruise on the face, especially a black eye.
He woke up the morning after the brawl with a purple mouse under his eye.
Between rounds, the cutman pressed cold metal to the mouse so her eye wouldn't swell shut.
UsageRingside talk; outside boxing, black eye or bruise is the ordinary word.
Note
Fight vocabulary rather than medical language: the swelling that rises on a boxer's face, usually around the eye, after a punch.
Checked 2 Nov 2026 · 2 facts
- In boxing, mouse means a facial hematoma or black eye. en.wiktionary.org
- A punch can cause facial swelling, commonly around the eye. wbaboxing.com
- 8A cut of beef taken from the hind leg, lying next to the round.
- 9A length of slow match used to set off a firearm or a blasting charge.
- 10A binding of spun yarn or a metal clasp joining the point and shank of a hook to keep it from unhooking or bending open.
- 11To secure the open part of a hook, or the pin of a shackle, by binding it with marline, wire or a tie so it cannot slip or work loose.
- 12In set theory, a small model of part of Zermelo-Fraenkel set theory chosen for its desirable structural properties.
- 13A small cushion placed under a woman's hair to add height or fullness.
- 14An affectionate name used for a sweetheart or dearly loved companion.
Let the bloat King tempt you again to bed, / Pinch wanton on your cheek, call you his mouse
c. 1599, William Shakespeare, Hamlet - 15To tear or rip apart, in the manner of a cat tearing at a mouse.
[Death] mousing the flesh of men.
c. 1596, William Shakespeare, “The Life and Death of King Iohn”
Showing meanings only.
Practice
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Origin
The word comes from Middle English mous and Old English mūs, tracing back through Proto-Germanic *mūs to the Proto-Indo-European root *múHs. It has many relatives, including German Maus, Dutch muis, Latin mūs, and Ancient Greek mûs. The computing sense is first recorded in a 1965 report led by American engineer Bill English, and the device was named for its resemblance to the animal.
Checked 1 Nov 2026 · 7 facts
- Mouse descends through Middle English mous, Old English mūs and Proto-Germanic *mūs from Proto-Indo-European *múHs. en.wiktionary.org
- German Maus and Dutch muis are cognates. en.wiktionary.org
- Latin mūs and Ancient Greek mûs are cognates. en.wiktionary.org
- The earliest recorded computing use is in the 1965 report Computer-Aided Display Control. en.wikipedia.org
- Bill English led the report. srialumni.org
- Bill English was an American engineer. en.wikipedia.org
- The device was named for its resemblance to a mouse. sri.com