What is the meaning of perturbing?

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: perturb, 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"
  • synonyms: perturb
• 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"
  • synonyms: perturb
• Throw into great confusion or disorder.
  • usage: "Fundamental Islamicists threaten to perturb the social order in Algeria and Egypt"
  • synonyms: perturb, derange, throw out of kilter

adjective

• Causing distress or worry or anxiety.
  • usage: "distressing (or disturbing) news"; "lived in heroic if something distressful isolation"; "a disturbing amount of crime"; "a revelation that was most perturbing"; "a new and troubling thought"; "in a particularly worrisome predicament"; "a worrying situation"; "a worrying time"
  • synonyms: distressing, distressful, disturbing, troubling, worrisome, worrying