resonance

noun

• 1the quality in a sound of being deep, full, and reverberating:the resonance of his voice
• the power to evoke enduring images, memories, and emotions:the concepts lose their emotional resonance

• 2 Physics the reinforcement or prolongation of sound by reflection from a surface or by the synchronous vibration of a neighbouring object.

• 3the condition in which an electric circuit or device produces the largest possible response to an applied oscillating signal.
• Mechanics the condition in which an object or system is subjected to an oscillating force having a frequency close to its own natural frequency.

• 4 Astronomy the occurrence of a simple ratio between the periods of revolution of two bodies about a single primary.

• 5 Chemistry the property of having a molecular structure which cannot adequately be represented by a single structural formula but is a composite of two or more structures of higher energy.

• 6 [count noun] Physics a short-lived subatomic particle that is an excited state of a more stable particle.