What is the meaning of deflection?

noun

• A twist or aberration; especially a perverse or abnormal way of judging or acting.
  • synonyms: warp
• The amount by which a propagating wave is bent.
  • synonyms: deflexion, refraction
• The movement of the pointer or pen of a measuring instrument from its zero position.
  • synonyms: deflexion
• The property of being bent or deflected.
  • synonyms: deflexion, bending
• A turning aside (of your course or attention or concern. )
  • usage: "a diversion from the main highway"; "a digression into irrelevant details"; "a deflection from his goal"
  • synonyms: diversion, deviation, digression, deflexion, divagation