(adjective) Healthy. Example: "He was safe and sound."
"We all know that light travels faster than sound. That's why certain people appear bright until you hear them speak."
"The man that hath no music in himself, Nor is not moved with concord of sweet sounds, is fit for treasons, stratagems and spoils."
"A young man who wishes to remain a sound atheist cannot be too careful of his reading."
"His laugh sounds an awful lot like my happiness."
"A system of morality which is based on relative emotional values is a mere illusion, a thoroughly vulgar conception which has nothing sound in it and nothing true."
"Heard the bullets whistle, and, believe me, there is something charming in the sound."
"An empty vessel makes the loudest sound, so they that have the least wit are the greatest babblers."
"Be extremely subtle even to the point of formlessness. Be extremely mysterious even to the point of soundlessness. Thereby you can be the director of the opponent's fate."
"The object of art is to intensify feeling, color or sound."
"Lightning makes no sound until it strikes."
"He fell as gently as a tree falls. There was not even any sound."