World English Dictionary
mute (mjuːt)

—adj
1. not giving out sound or speech; silent
2. unable to speak; dumb
3. unspoken or unexpressed: mute dislike
4. law(of a person arraigned on indictment) refusing to answer a charge
5. phonetics another word for plosive
6. (of a letter in a word) silent

—n
7. a person who is unable to speak
8. law a person who refuses to plead when arraigned on indictment for an offence
9. any of various devices used to soften the tone of stringed or brass instruments
10. phonetics a plosive consonant; stop
11. a silent letter
12. an actor in a dumb show
13. a hired mourner at a funeral

—vb
14. to reduce the volume of (a musical instrument) by means of a mute, soft pedal, etc
15. to subdue the strength of (a colour, tone, lighting, etc)