S: (n) incident (a public disturbance) "the police investigated an incident at the bus station"
Adjective
S: (adj) incident (falling or striking of light rays on something) "incident light"
S: (adj) incidental, incident ((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"