What is the meaning of resonance?

noun

• An excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation.
• 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.
• Having the character of a loud deep sound; the quality of being resonant.
  • synonyms: plangency, reverberance, ringing, sonorousness, sonority, vibrancy
• A relationship of mutual understanding or trust and agreement between people.
  • synonyms: rapport
• The quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities. .