English dictionary

perturbation

/,p/[@]/rt/@/r'b/eI//S//@/n/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

an unhappy and worried mental state

noun.state

Synonyms disturbance upset

Source: WordNet 3.0
(physics) a secondary influence on a system that causes it to deviate slightly

noun.phenomenon

Source: WordNet 3.0
activity that is a malfunction, intrusion, or interruption

noun.event

Examples
The term `distress' connotes some degree of perturbation and emotional upset.

Synonyms disturbance

Source: WordNet 3.0
a disposition that is confused or nervous and upset

noun.attribute

Synonyms fluster

Source: WordNet 3.0
the act of causing disorder

noun.act

Synonyms disruption

Source: WordNet 3.0
The act of perturbing, or the state of being perturbed; esp., agitation of mind.

noun

Source: webster1913