AskDefine | Define perturb

Dictionary Definition



1 disturb in mind or make uneasy or cause to be worried or alarmed; "She was rather perturbed by the news that her father was seriously ill" [syn: unhinge, disquiet, trouble, cark, distract, disorder]
2 disturb or interfere with the usual path of an electron or atom; "The electrons were perturbed by the passing ion"
3 cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull; "The orbits of these stars were perturbed by the passings of a comet"
4 throw into great confusion or disorder; "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt" [syn: derange, throw out of kilter]

User Contributed Dictionary




  1. To disturb; to bother or unsettle.
  2. To slightly modify the motion of an object.
  3. To modify the motion of a body by exerting a gravitational force.
  4. To modify slightly, such as an equation or value.

Derived terms

Extensive Definition

Perturbation or perturb may refer to any of numerous concepts in several fields:
perturb in German: Perturbation
perturb in Spanish: Perturbación
perturb in French: Perturbation
perturb in Russian: Пертурбация

Synonyms, Antonyms and Related Words

Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1