noun
perturbation
per-ter-BAY-shun/ˌpɜːrtərˈbeɪʃn/
A disturbance that alters a system's state or motion.
The dropped stone causes a perturbation that sends ripples across the pool.
Etymology
The ending turns the act of disturbing or confusing into a noun for that disturbance. Its early English use already referred to mental disturbance, directly connecting it with anxiety and unease.
In context
in fear and trembling as great as Don Quixote’s perturbation. Each instant the noise increased and came nearer to the two terrified men
More examples
- A sudden temperature change causes a perturbation in the chemical system.
- The circuit remains stable despite small perturbations in voltage.
- After each perturbation, the pendulum gradually returns to its resting position.
Forms
perturbation · perturbations
perturb verb — To disturb a system's state or motion.
Similar words
- disturbance
- A broader term for any interruption of normal conditions.
- deviation
- Emphasizes departure from an expected path rather than its cause.
- disruption
- Usually suggests a stronger interruption of normal operation.