Definition of soundless:
smooth, unruffled, quiescent, muted, tranquil, stilly, silence, noneffervescent, motionless, unsounded, sounds, placid, static, inactive, quieted, you could hear a pin drop, quiet as a mouse, hush, understood, tacit.
- "The Thing in the Attic", James Benjamin Blish.
- "The Outlaw of Torn", Edgar Rice Burroughs.
- "The Adventures of Jimmie Dale", Frank L. Packard.