n. The act of reverberating, or of driving or turning back; particularly. the reflection of sound, light, or heat: now chiefly of sound.n. Resonance; sympathetic vibration.n. That which is reverberated; reverberated light, heat, or sound: now chiefly sound.n. The circulation of flame in a specially formed furnace, or its deflection toward the hearth of the furnace, as in the reverberatory furnace (which see, under furnace).n. In psychology, same as resonance, 5 .