Definitions of voice:

• noun:   a means or agency by which something is expressed or communicated

  Example: "The voice of the law"

• noun:   the distinctive quality or pitch or condition of a person's speech

  Example: "A shrill voice sounded behind us"

• noun:   the ability to speak

  Example: "He lost his voice"

• noun:   the sound made by the vibration of vocal folds modified by the resonance of the vocal tract

  Example: "A singer takes good care of his voice"

• noun:   something suggestive of speech in being a medium of expression

  Example: "The wee small voice of conscience"

• noun:   a sound suggestive of a vocal utterance

  Example: "The noisy voice of the waterfall"

• noun:   (metonymy) a singer

  Example: "He wanted to hear trained voices sing it"

• noun:   (linguistics) the grammatical relation (active or passive) of the grammatical subject of a verb to the action that the verb denotes
• noun:   the melody carried by a particular voice or instrument in polyphonic music
• noun:   expressing in coherent verbal form

  Example: "I gave voice to my feelings"

• noun:   an advocate who represents someone else's policy or purpose
• verb:   give voice to

  Example: "He voiced his concern"

• verb:   utter with vibrating vocal chords
• name:  A surname (very rare: popularity rank in the U.S.: #48781)