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resonance (n.)

mid-15c., resonaunce, in acoustics, "prolongation or repetition of sound by reflection, reverberation;" from Old French resonance (15c.) and directly from Latin resonantia "an echo," from resonare "to sound again, sound back" (see resound). Earlier in same sense was resonation (early 15c.). From 1660s as "act of resonating."  

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Definitions of resonance from WordNet

resonance (n.)
an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation;
resonance (n.)
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;
resonance (n.)
having the character of a loud deep sound; the quality of being resonant;
Synonyms: plangency / reverberance / ringing / sonorousness / sonority / vibrancy
resonance (n.)
a relationship of mutual understanding or trust and agreement between people;
Synonyms: rapport
resonance (n.)
the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities;
From wordnet.princeton.edu