Definition of mouse noun from the Oxford Advanced Learner's Dictionary

      

    mouse

     noun
    noun
    BrE BrE//maʊs//
     
    ; NAmE NAmE//maʊs//
     
    Computer hardware, In the office, Wild mammals, Pets
     
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  1. 1  (pl. mice
    BrE BrE//maɪs//
     
    ; NAmE NAmE//maɪs//
     
    )
    a small animal that is covered in fur and has a long thin tail. Mice live in fields, in people’s houses or where food is stored. a field mouse a house mouse The stores were overrun with rats and mice. She crept upstairs, quiet as a mouse. (figurative) He was a weak little mouse of a man. see also dormouse See related entries: Wild mammals, Pets
  2. 2   (mice, mouses) (computing) a small device that is moved by hand across a surface to control the movement of the cursor on a computer screen Click the left mouse button twice to highlight the program. Use the mouse to drag the icon to a new position. See related entries: Computer hardware, In the office
  3. Word Origin Old English mūs, (plural) mȳs, of Germanic origin; related to Dutch muis and German Maus, from an Indo-European root shared by Latin and Greek mus.Extra examples A mouse has gnawed its way through the telephone wire. Move the cursor around the screen with the mouse. She crept upstairs, as quiet as a mouse. Some of these mouse click short cuts are worth learning.Idioms
    play (a game of) cat and mouse with somebody, play a cat-and-mouse game with somebody
     
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    to play a cruel game with somebody in your power by changing your behaviour very often, so that they become nervous and do not know what to expect He thought the police were playing some elaborate game of cat and mouse and waiting to trap him.
    when the cat’s away the mice will play
     
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    (saying) people enjoy themselves more and behave with greater freedom when the person in charge of them is not there
See the Oxford Advanced American Dictionary entry: mouse