- to disturb or disquiet greatly in mind; agitate: I can see how such a massive change in your routine would perturb you.
- to throw into great disorder: Huge construction projects can take years to finish, and meanwhile, can greatly perturb the neighborhood.
- to cause perturbation in the orbit of (a celestial body).
- to disturb the composure of; trouble
- to throw into disorder
- to cause (a planet, electron, etc) to undergo a perturbation
