Of sounds: So dull as to be hardly or indistinctly heard; muffled. Obsolete.

Deprived of life or force; dulled, muffled, etc.

Of sound: Suppressed, rendered indistinct.

Faint, indistinct.

Of a sound: deadened as if proceeding from something muffled. Also figurative.

Rendered mute or silent; softened or deadened in volume or tone; (of a musical instrument) having the sound muffled or altered by means of a mute…

Muffled, subdued. rare.

Muffled, subdued. Also figurative.