Perturbation meaning

pûr'tər-bā'shən
Perturbation is an anxiety or disturbance, or is a cause of disturbance, or a from what is normal, especially when the deviation is caused by an outside influence.

When you are feeling anxious about something you are required to do but don't like do, this is an example of perturbation.

When your routine or schedule is interrupted because of a friend, this can be an example of perturbation.

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A small change in a physical system, such as a variation in a planet's orbit resulting from the gravitational influence of other celestial bodies.
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Something that perturbs; disturbance.
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A small change in an orbit caused by the attraction of another celestial body, other bodies, etc.
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A small change in a physical system, most often in a physical system at equilibrium that is disturbed from the outside.
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Variation in a designated orbit, as of a planet, that results from the influence of one or more external bodies. Gravitational attraction between planets can cause perturbations and cause a planet to deviate from its expected orbit. Perturbations in Neptune's orbit led to the discovery of the object—Pluto—that was causing the perturbation. Perturbations in the orbits of stars have led to the discovery of planetary systems outside of our Solar system.
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A disturbance or irregularity. For example, a "perturbation in an input signal" that is not properly dealt with may cause erroneous output or a system failure.
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(uncountable) Agitation; the state of being perturbed.
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(countable) A small change in a physical system, or more broadly any definable system (such as a biological or economic system)
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(countable, astronomy, physics) Variation in an orbit due to the influence of external bodies.
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A perturbing or being perturbed.
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Origin of perturbation