noun, plural mice [mahys]
, verb, moused, mous⋅ing.| 1. | any of numerous small Old World rodents of the family Muridae, esp. of the genus Mus, introduced widely in other parts of the world. |
| 2. | any similar small animal of various rodent and marsupial families. |
| 3. | a quiet, timid person. |
| 4. | Computers. a palm-sized, button-operated device that can be slid on wheels or ball bearings over a desktop to move the cursor on a CRT to any position, or slid over a drawing in order to recreate the drawing on a CRT. Compare joystick (def. 2). |
| 5. | Informal. a swelling under the eye, caused by a blow or blows; black eye. |
| 6. | Slang. a girl or woman. |
| 7. | to hunt out, as a cat hunts out mice. |
| 8. | Nautical. to secure with a mousing. |
| 9. | to hunt for or catch mice. |
| 10. | to prowl about, as if in search of something: The burglar moused about for valuables. |
| 11. | to seek or search stealthily or watchfully, as if for prey. |

A common device that allows the user to reposition an arrow on their computer screen in order to activate desired applications. The term mouse comes from the appearance of the device, with the cord to the main computer being seen as a tail of sorts.
Note: The user usually sends signals to the computer when the user depresses or “clicks” a switch. A number of slang terms, such as “click on X” or “click and drag” have arisen from the appearance of symbols on a screen when a mouse is used.
| mouse (mous) Pronunciation Key
Plural mice (mīs) or mouses A hand-held input device that is moved about on a flat surface to direct the cursor on a computer screen. It also has buttons for activating computer functions. The underside of a mechanical mouse contains a rubber-coated ball that rotates as the mouse is moved; optical sensors detect the motion and move the screen pointer correspondingly. An optical mouse is cordless and uses reflections from an LED to track the mouse's movement over a special reflective mat which is marked with a grid that acts as a frame of reference. |