mouse in WordNet English dictionary

1. a swollen bruise caused by a blow to the eye
   shiner  black eye  mouse 
   
2. a hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad
   "a mouse takes much more room than a trackball"
   mouse  computer mouse 
   
3. any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tails
   mouse 
   
4. person who is quiet or timid
   mouse 
   

1. to go stealthily or furtively
   "..stead of sneaking around spying on the neighbor's house"
   sneak  mouse  creep  pussyfoot 
   
2. manipulate the mouse of a computer
   mouse