To move cautiously or furtively, in the manner of a mouse (the rodent) (frequently used in the phrasal verb to mouse around).
To hunt or catch mice (the rodents), usually of cats.
To close the mouth of a hook by a careful binding of marline or wire.
Captain Higgins moused the hook with a bit of marline to prevent the block beckets from falling out under slack.
To navigate by means of a computer mouse.
To tear, as a cat devours a mouse.