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3 definitions found
 for Perturb
From The Collaborative International Dictionary of English v.0.48 :

  Perturb \Per*turb"\, v. t. [L. perturbare, perturbatum; per +
     turbare to disturb, fr. turba a disorder: cf. OF. perturber.
     See Per-, and Turbid.]
     1. To disturb; to agitate; to vex; to trouble; to disquiet.
        [1913 Webster]
              Ye that . . . perturb so my feast with crying.
        [1913 Webster]
     2. To disorder; to confuse. [R.] --Sir T. Browne.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

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

From Moby Thesaurus II by Grady Ward, 1.0 :

  110 Moby Thesaurus words for "perturb":
     abash, addle, addle the wits, afflict, agitate, ail, alarm,
     ball up, be the matter, beat, beat up, becloud, bedazzle, befuddle,
     beset, bewilder, bother, bug, burden, churn, churn up, cloud,
     complicate matters, concern, confuse, convulse, daze, dazzle,
     disarrange, discombobulate, discomfit, discomfort, discommode,
     discompose, disconcert, dishevel, dismay, disorder, disorganize,
     disorient, disquiet, distract, distress, disturb, electrify,
     embarrass, embroil, entangle, excite, ferment, flummox, flurry,
     fluster, flutter, fog, fret, fuddle, fuss, harass, inconvenience,
     irk, jar, jolt, jumble, knock galley-west, load with care, maze,
     mist, mix up, moider, muddle, paddle, perplex, perturbate, plague,
     pother, psych, put out, put to it, puzzle, raise hell, rattle,
     rile, ripple, rock, roil, roughen, ruffle, rumple, shake, shake up,
     shock, spook, stagger, stir, stir up, swirl, throw,
     throw into confusion, torment, trouble, unnerve, unsettle, upset,
     vex, whip, whip up, whisk, work up, worry

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