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perturb

used in a sentence
2 meanings
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1  —as in:
she was perturbed
Definition to disturb in mind or make uneasy
  • She is not perturbed by attacks from a hostile press.
perturbed = disturbed
Other Uses (with this meaning)
  • She was perturbed by the criticism, but resolved to continue.
  • perturbed = disturbed
  • Rest, rest, perturbed spirit!
    William Shakespeare  --  Hamlet
  • I walked up and down my room hastily and perturbed, while my imagination conjured up a thousand images to torment and sting me.
    Mary Shelley  --  Frankenstein
  • Alyss glanced at Dodge, and the questioning, slightly perturbed expression on his face told her that they were thinking the same thing.
    Frank Beddor  --  The Looking Glass Wars
  • perturbed = disturbed
  • ABIGAIL, unperturbed, continuing to the "bird": Oh, Mary, this is a black art to change your shape.
    Arthur Miller  --  The Crucible
  • unperturbed = undisturbed
    (Editor's note:  The prefix "un-" in unperturbed means not and reverses the meaning of perturbed. This is the same pattern you see in words like unhappy, unknown, and unlucky.)
  • Ampleforth marched clumsily out between the guards, his face vaguely perturbed, but uncomprehending.
    George Orwell  --  1984
  • perturbed = disturbed
  • I walked up and down my room hastily and perturbed, while my imagination conjured up a thousand images to torment and sting me.
    Mary Shelley  --  Frankenstein
  • perturbed = disturbed or uneasy
  • "Well now, that is a shame," agreed Hannah, unperturbed.
    Elizabeth George Speare  --  The Witch of Blackbird Pond
  • unperturbed = undisturbed
    (Editor's note:  The prefix "un-" in unperturbed means not and reverses the meaning of perturbed. This is the same pattern you see in words like unhappy, unknown, and unlucky.)
  • Tom was evidently perturbed at Daisy's running around alone, for on the following Saturday night he came with her to Gatsby's party.
    F. Scott Fitzgerald  --  The Great Gatsby
perturbed = disturbed

Dictionary / pronunciation — Google®Dictionary list — Onelook.com®
2  
perturbation of the orbit
Definition physics or astronomy:  a secondary influence on a system that causes it to deviate slightly
  • The planet, Neptune, was discovered after its existence was predicted by perturbations in Uranus' orbit.
Other Uses (with this meaning)
  • If the perturbations are small, the procedure should work.
  • perturbations = a secondary influence on a system that causes it to deviate slightly
  • One has to study the evolution of perturbations over time to find out if the configuration is stable.
  • A great perturbation in nature,—to receive at once the benefit of sleep, and do the effects of watching—
    William Shakespeare  --  Macbeth
  • perturbation = deviation (from the natural course of things)
  • from study and perturbation of the brain
    William Shakespeare  --  Henry IV, Part 2
  • perturbation = disturbance (of the mind)
  • damped stochastic perturbations
  • The Major thought he recognized the piano, though, with the picture over it, as it used to be in former days, and his perturbations were renewed.
    William Makepeace Thackeray  --  Vanity Fair
  • Also, there were comings and goings, and the erstwhile placid atmosphere of the cabin was vexed with strange perturbations and unrest.
    Jack London  --  White Fang
  • Then you looked for perturbations that might indicate other planets.
    John Ringo  --  Live Free or Die
  • Then shall all vain imaginations, evil perturbations, and superfluous cares fly away; then shall immoderate fear leave thee, and inordinate love shall die.
    George Eliot  --  The Mill on the Floss

Dictionary / pronunciation — Google®Dictionary list — Onelook.com®
Less commonly:
More rarely, perturbation can be used in the more general sense meaning:  to disturb in mind or make uneasy — as when Jane Austen wrote: "the perturbation of Elizabeth's feelings was at every moment increasing."
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