mouse S2 W3 /maʊs/ BrE AmE noun [countable]
[ Language: Old English ; Origin: mus ]
1 . ( plural mice /maɪs/) a small furry animal with a pointed nose and a long tail that lives in people’s houses or in fields:
The cat laid a dead mouse at my feet.
a field mouse
2 .
( plural mouses ) a small object connected to a computer by a wire, which you move with your hand to give instructions to the computer:
Select the printer icon and then click the left mouse button.
3 . ( plural mice ) informal a quiet nervous person
⇨ play cat and mouse at ↑ cat (4), ⇨ quiet as a mouse at ↑ quiet 1 (1)