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1. Dictionary

   per·tur·ba·tion

   /ˌpərdərˈbāSH(ə)n/

   noun

   • 1. anxiety; mental uneasiness: "she sensed her friend's perturbation"
   • ▪ a cause of anxiety or uneasiness: "Frank's atheism was more than a perturbation to Michael"
   • 2. a deviation of a system, moving object, or process from its regular or normal state or path, caused by an outside influence: "some minor perturbation in his house's cash flow"
   • ▪ a minor deviation in the course of a celestial body, caused by the gravitational attraction of a neighboring body.

   Word Origin late Middle English: from Latin perturbatio(n-), from the verb perturbare ‘disturb greatly’ (see perturb).

   Scrabble Points: 16

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2. www.merriam-webster.com › dictionary › perturbationPerturbation Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › perturbation

   • Cached

   Perturbation is the action of perturbing or the state of being perturbed, especially a disturbance of the regular motion of a celestial body. Learn more about the word history, synonyms, examples, and related entries of perturbation.

3. dictionary.cambridge.org › dictionary › englishPERTURBATION | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   Perturbation can mean worry or a small change in the regular movement of an object. Learn more about the word, its usage and related terms with examples from the Cambridge English Corpus.

4. www.vocabulary.com › dictionary › perturbationPerturbation - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › perturbation

   It usually means a personal feeling of upset or nervousness, but perturbation can also be a physical disruption of some kind, like a perturbation in a river that makes the water become choppy and dangerous.

5. www.dictionary.com › browse › perturbationPERTURBATION Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › perturbation

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   perturbation. / ˌpɜːtəˈbeɪʃən / noun. the act of perturbing or the state of being perturbed. a cause of disturbance or upset. physics a secondary influence on a system that modifies simple behaviour, such as the effect of the other electrons on one electron in an atom.

6. dictionary.cambridge.org › us › dictionaryPERTURBATION definition | Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

   • Cached

   Perturbation can mean worry or a small change in the regular movement of an object. Learn more about the word, its usage and related terms with examples from various sources.

7. www.collinsdictionary.com › dictionary › englishPERTURBATION definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

   • Cached

   Perturbation is a noun that means a small change or disturbance in something, especially an unusual change. It can also mean worry or upset caused by some event. See different meanings, synonyms, pronunciation, and usage examples of perturbation.

8. www.thefreedictionary.com › perturbationPerturbation - definition of perturbation by The Free Dictionary

   www.thefreedictionary.com › perturbation

   • Cached

   Perturbation is a noun that means a small change in a system, a state of agitation, or a cause of disturbance. It can also refer to a variation in the orbit of a celestial body due to the influence of other bodies. See different sources and translations of the word.