#1 perturb v. [unhinge, disquiet, trouble, cark, distract, disorder] 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". wn
#2 perturb v. disturb or interfere with the usual path of an electron or atom; "The electrons were perturbed by the passing ion". wn
#3 perturb v. 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". wn
#4 perturb v. [derange, throw out of kilter] throw into great confusion or disorder; "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt". wn
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