To dream of a mouse indicates panic, low self-esteem, and passivity. You may be experiencing feelings of inadequacy and inferiority for not being able to measure up to standards. This dream is telling you that it is time to let your voice be heard and your presence acknowledged, instead of hiding in the sidelines. Alternatively, it is also symbolic of small distractions and annoyances you are experiencing. The dream may likewise indicate a computer mouse which links you and the rest of the world.
To dream that you have killed or trapped a mouse suggests that there are persons in your waking life that are literally putting you down,
To dream that someone is eating a mouse means that there is something that you need to get off your chest, which may be guilt or a truth that has to be told.
To dream that a mouse is being chased indicates that you are afraid to make a stand. You are allowing other people to boss you around.