perturbation

noun

1. an unhappy and worried mental state

Similar word(s): disturbance, upset

Definition categories: state, agitation

2. (physics) a secondary influence on a system that causes it to deviate slightly

Definition categories: phenomenon, influence

3. activity that is a malfunction, intrusion, or interruption

- the term `distress' connotes some degree of perturbation and emotional upset

Similar word(s): disturbance

Definition categories: event, activity

4. a disposition that is confused or nervous and upset

Similar word(s): fluster

Definition categories: attribute, discomposure

5. the act of causing disorder

Similar word(s): disruption

Definition categories: act, disturbance