Silence, for whatever reason, may be the answer
If you dream of you or somebody else being mute, this indicates your inability to persuade others into your mode of thinking. This dream may also signify that you have been gossiping about others behind their backs, for your own purposes - a bad practice.
Dreams of being mute signify that you are suppressing your feelings. Perhaps you are especially awareness of the power of words, and you are feeling trepidatious about what would happen if you expressed yourself. Alternatively, this dream can be showing you that a lack of frivolous chatter makes for great introspection and depth, and that sometimes silence is golden.
To converse with a mute in your dreams, foretells that unusual crosses in your life will fit you for higher positions, which will be tendered you.
To dream that you are a mute, portends calamities and unjust persecution.