Definition of perturbance in US English:

perturbance

noun

  • Perturbation.

Origin

Late Middle English; earliest use found in John Lydgate (c1370–c1449), poet and prior of Hatfield Regis. From classical Latin perturbant-, perturbāns, present participle of perturbāre: see -ance.

Pronunciation

perturbance

/pəˈtəːb(ə)ns/