Definition of perturbation in English:

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Pronunciation: /ˌpərdərˈbāSH(ə)n/


1Anxiety; mental uneasiness: she sensed her friend’s perturbation
More example sentences
  • The joy in anticipating the arrival of the child is often replaced with perturbation and anxiety.
  • One who is not the source of annoyance to the world, one who never feels offended with the world, one who is free from both delight and anger, perturbation and fear, ‘that devotee is dear to Me’.
  • You may not entirely sympathize with his auto-hypnotic perturbation of mind, but you certainly feel like you've been a little hypnotized yourself.
1.1A cause of anxiety or uneasiness: Frank’s atheism was more than a perturbation to Michael
More example sentences
  • This 31-day period of perturbations probably has a great deal more to do with things that go bump in the night than many care to admit in front of their friends and family.
  • The passivity of passions and the stirrings of perturbations may initially seem at odds with one another: the one at rest, the other in motion; the one inactive, the other driving.
  • For all my perturbations it was nothing to worry about.
2A deviation of a system, moving object, or process from its regular or normal state of path, caused by an outside influence: some minor perturbation in his house’s cash flow
More example sentences
  • These data are consistent with the notion that the perturbation to the system due to the UV light pulse was minimal to the overall function of the mitochondria.
  • The neoclassical view starts from a paradigm of competitive equilibrium and considers shocks to the system and perturbations of cost and demand.
  • The numerical perturbation method uses a computer to numerically process perturbations.
2.1 Astronomy A minor deviation in the course of a celestial body, caused by the gravitational attraction of a neighboring body.
Example sentences
  • The claimed discoveries were to the southwest of the Sun, whereas any body causing the charted perturbations of Mercury would need to have been to the east.
  • Gravity working over billions of years would have magnified these perturbations into the universe we observe today.
  • These presumably cometary bodies, which reach several hundred kilometers in size, are vulnerable to severe perturbations by these planets.


Late Middle English: from Latin perturbatio(n-), from the verb perturbare 'disturb greatly' (see perturb).

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Syllabification: per·tur·ba·tion

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