Resonance(n.) The act of resounding; the quality or state of being resonant.
Resonance(n.) A prolongation or increase of any sound, either by reflection, as in a cavern or apartment the walls of which are not distant enough to return a distinct echo, or by the production of vibrations in other bodies, as a sounding-board, or the bodies of musical instruments.
Resonancy(n.) Resonance.
Resonant(a.) Returning, or capable of returning, sound; fitted to resound; resounding; echoing back.
Resonantly(adv.) In a resonant manner.
Resonator(n.) Anything which resounds; specifically, a vessel in the form of a cylinder open at one end, or a hollow ball of brass with two apertures, so contrived as to greatly intensify a musical tone by its resonance. It is used for the study and analysis of complex sounds.
Words within resonation