Quick definitions from WordNet (voice)

▸ noun:  a means or agency by which something is expressed or communicated ("The voice of the law")
▸ noun:  the distinctive quality or pitch or condition of a person's speech ("A shrill voice sounded behind us")
▸ noun:  the ability to speak ("He lost his voice")
▸ noun:  the sound made by the vibration of vocal folds modified by the resonance of the vocal tract ("A singer takes good care of his voice")
▸ noun:  something suggestive of speech in being a medium of expression ("The wee small voice of conscience")
▸ noun:  a sound suggestive of a vocal utterance ("The noisy voice of the waterfall")
▸ noun:  (metonymy) a singer ("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 ("I gave voice to my feelings")
▸ noun:  an advocate who represents someone else's policy or purpose
▸ verb:  give voice to ("He voiced his concern")
▸ verb:  utter with vibrating vocal chords
▸ name:  A surname (very rare: popularity rank in the U.S.: #48781)

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▸ Also see voice