What is the meaning of perturb?

verb

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