Definition of "voiceless"

voiceless

/ˈvɔɪsləs/

adjective
not comparable
1. Lacking a voice, without vocal sound.
  Quotations
  A voiceless song in an ageless light / Sings at the coming dawn / Birds in flight are calling there / Where the heart moves the stones / It's there that my heart is calling / All for the love of you.
  1994, Loreena McKennitt, The Mystic's Dream
2. (figurative) Without a vote; having no input into a decision.
3. (phonetics, of a consonant or vowel) Spoken without vibration of the vocal cords; unvoiced, surd, breathed. Examples: [t], [s], [f], [m̥], [u̥].