'Vibrancy' definitions:

Definition of 'vibrancy'

From: WordNet
noun
Having the character of a loud deep sound; the quality of being resonant [syn: plangency, resonance, reverberance, ringing, sonorousness, sonority, vibrancy]

Definition of 'Vibrancy'

From: GCIDE
  • Vibrancy \Vi"bran*cy\, n. The state of being vibrant; resonance. [1913 Webster]