What is not uttered; unpronounced; silent; also, produced by complete closure of the mouth organs which interrupt the passage of breath; -- said of certain letters. See 5th Mute, 2 called?

mute — Not uttered; unpronounced; silent; also, produced by complete closure of the mouth organs which interrupt the passage of breath; -- said of certain letters. See 5th Mute, 2. (Webster's 1913.)