Resonance

n.	1.	The act of resounding; the quality or state of being resonant.
	2.	(Acoustics) 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.
	3.	(Physics) A phenomenon in which a vibration or other cyclic process (such as tide cycles) of large amplitude is produced by smaller impulses, when the frequency of the external impulses is close to that of the natural cycling frequency of the process in that system.
	4.	(Electronics) An electric phenomenon corresponding to that of acoustic resonance, due to the existance of certain relations of the capacity, inductance, resistance, and frequency of an alternating circuit; the tuning of a radio transmitter or receiver to send or detect waves of specific frequencies depends on this phenomenon. Pulmonary resonance (Med.) the sound heard on percussing over the lungs. Vocal resonance (Med.) the sound transmitted to the ear when auscultation is made while the patient is speaking.

Noun	1.	resonance - an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation
	2.	resonance - a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system
	3.	resonance - having the character of a loud deep sound; the quality of being resonant Synonyms: plangency, reverberance, sonority, sonorousness, vibrancy, ringing
	4.	resonance - relation of mutual understanding or trust and agreement between people Synonyms: rapport
	5.	resonance - the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities

amplitude, antinode, crest, de Broglie wave, diffraction, electromagnetic radiation, electromagnetic wave, fluctuation, frequency, frequency band, frequency spectrum, guided wave, harmonic motion, in phase, interference, libration, light, longitudinal wave, mechanical wave, node, nutation, oscillation, out of phase, pendulation, period, periodic wave, periodicity, radio wave, ray, reinforcement, resonance frequency, seismic wave, shock wave, sound wave, surface wave, tidal wave, transverse wave, trough, vacillation, vibrancy, vibratility, vibration, wave, wave equation, wave motion, wave number, wavelength, wavering