Mouse

mouse [countable]

1 plural mice 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 (a game of) cat and mouse (with somebody)

to pretend to allow someone to do or have what they want, and then to stop them from doing or having it:

The police played an elaborate game of cat and mouse to trap him.

As quiet as mouse :very quiet

• I'll be as quiet as a mouse