perturbation (n.)

  1. an unhappy and worried mental state; there was too much anger and disturbance; she didnt realize the upset she caused me

    [ Syn: disturbance , upset ]

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

  3. activity that is a malfunction, intrusion, or interruption; the term `distress connotes some degree of perturbation and emotional upset; he looked around for the source of the disturbance; there was a disturbance of neural function

    [ Syn: disturbance ]

  4. a disposition that is confused or nervous and upset

    [ Syn: fluster ]

  5. the act of causing disorder

    [ Syn: disruption ]

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.