a. 1. Having no voice, utterance, or vote; silent; mute; dumb. [ 1913 Webster ]
I live and die unheard,
With a most voiceless thought, sheathing it as a sword. Byron. [ 1913 Webster ]
2. (Phon.) Not sounded with voice; as, a voiceless consonant; surd. [ 1913 Webster ]
Voiceless stop (Phon.), a consonant made with no audible sound except in the transition to or from another sound; a surd mute, as p, t, k. [ 1913 Webster ]
-- Voice"less*ly, adv. -- Voice"less*ness, n. [ 1913 Webster ]