disturb or interfere with the usual path of an electron or atom; "The electrons were perturbed by the passing ion"
throw into great confusion or disorder; "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt" (同)derange, throw out of kilter
disturb in mind or make uneasy or cause to be worried or alarmed; "She was rather perturbed by the news that her father was seriously ill" (同)unhinge, disquiet, trouble, cark, distract, disorder
cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull; "The orbits of these stars were perturbed by the passings of a comet"
throw into disorder; "This event disrupted the orderly process"