Associations to the word «Perturbation»

Wiktionary

PERTURBATION, noun. (uncountable) Agitation; the state of being perturbed
PERTURBATION, noun. (countable) A small change in a physical system, or more broadly any definable system (such as a biological or economic system)
PERTURBATION, noun. (countable) (astronomy) (physics) Variation in an orbit due to the influence of external bodies
PERTURBATION THEORY, noun. A mathematical technique for finding an approximate solution to a problem that cannot be solved exactly, by starting from the exact solution of a related problem; used in modelling physical interactions between particles, etc.

Dictionary definition

PERTURBATION, noun. An unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me".
PERTURBATION, noun. (physics) a secondary influence on a system that causes it to deviate slightly.
PERTURBATION, noun. 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".
PERTURBATION, noun. A disposition that is confused or nervous and upset.
PERTURBATION, noun. The act of causing disorder.

Wise words

All our words from loose using have lost their edge.
Ernest Hemingway