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Meaning of perturbation

per•tur•ba•tion

Pronunciation: (pûr"tur-bā'shun), [key]
— n.
  1. the act of perturbing.
  2. the state of being perturbed.
  3. mental disquiet, disturbance, or agitation.
  4. a cause of mental disquiet, disturbance, or agitation.
  5. deviation of a celestial body from a regular orbit about its primary, caused by the presence of one or more other bodies that act upon the celestial body.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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