n.
1.a single distinct event
2.a public disturbance
the police investigated an incident at the bus station
adj.
1.falling or striking of light rays on something
incident light
2.(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