Definitions

1. verb

to disturb or disquiet (someone or something)

“Her nerves were perturbed by the news of the accident.”

2. verb

to put or bring into a state of disturbance or disorder

“The storm will perturb the calm waters of the lake.”

3. noun

a disturbance or upheaval, especially in the Earth’s magnetic field

“The scientists monitored the solar flare’s perturbation of the magnetic field.”

4. noun

an alteration or change in the apparent position of a celestial body

“The astronomers detected a perturbation in the planet’s orbit.”