incident

Adjective

• (sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
  • incidental expenses
    
  • the road will bring other incidental advantages
    
  • extra duties incidental to the job
    
  • labor problems incidental to a rapid expansion
    
  • confusion incidental to a quick change
    

• falling or striking of light rays on something
  • incident light
    

Noun

• a public disturbance
  • the police investigated an incident at the bus station
    

• a single distinct event