What is perturb definition?

Perturb is a verb that means to disturb or upset the normal functioning or balance of something. It can also refer to causing someone to feel anxiety or worry. In scientific contexts, perturb has a more specific meaning, referring to the introduction of a disturbance or change into a mathematical or physical system to observe its response. The term perturbation is also used in astronomy to describe the small gravitational influences of other bodies on the orbit of a celestial object.