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Pronunciation:  `purtur'beyshun

WordNet Dictionary
  1. [n]  the act of causing disorder
  2. [n]  a disposition that is confused or nervous and upset
  3. [n]  activity that is an intrusion or interruption; "he looked around for the source of the disturbance"; "there was a disturbance of neural function"
  4. [n]  (physics) a secondary influence on a system that causes it to deviate slightly
  5. [n]  an unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me"

PERTURBATION is a 12 letter word that starts with P.


 Synonyms: disruption, disturbance, disturbance, fluster, upset
 See Also: activity, agitation, bother, breakdown, discomposure, dislocation, disturbance, fuss, hassle, influence, magnetic storm, surprisal, surprise, trouble, variation



Webster's 1913 Dictionary
\Per`tur*ba"tion\, n. [L. perturbatio: cf. F.
1. The act of perturbing, or the state of being perturbed;
   esp., agitation of mind.

2. (Astron.) A disturbance in the regular elliptic or other
   motion of a heavenly body, produced by some force
   additional to that which causes its regular motion; as,
   the perturbations of the planets are caused by their
   attraction on each other. --Newcomb.

Thesaurus Terms
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