in·ci·dent 
(ĭnsĭ-dənt)
(ĭnsĭ-dənt)n.
1.
a. A particular occurrence, especially one of minor importance. See Synonyms at occurrence.
b. An event in a narrative or drama.
2.
a. A usually violent or disruptive occurrence, especially one that precipitates a larger crisis: an international incident that provoked war.
b. An occurrence that interrupts normal procedure or functioning; a mishap: The plane landed without incident.
3. Law Something contingent on or related to something else.
adj.
1. Tending to arise or occur as a result or accompaniment: "There is a professional melancholy ... incident to the occupation of a tailor" (Charles Lamb).
2. Law Related to or dependent on another thing.
3. Physics Falling upon or striking a surface: incident radiation.
[Middle English, from Old French, apt to happen, an incident, from Latin incidēns, incident-, present participle of incidere, to happen : in-, on; see IN-2 + cadere, to fall; see kad- in the Appendix of Indo-European roots.]