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English definition of “incident”

incident

noun [C/U]  /ˈɪn·sə·dənt, -ˌdent/ us  

incident noun [C/U] (EVENT)

an event, esp. one that is either unpleasant or unusual: [C] Many shipping companies do not report incidents of piracy, for fear of raising their insurance rates. [U] The demonstration took place without incident.

incident

adjective [not gradable] /ˈɪn·sə·dənt, -ˌdent/

incident adjective [not gradable] (HITTING A SURFACE)

touching or hitting the surface of something incident ray (also incident wave) physics An incident ray or incident wave is a beam of light or other energy that hits a surface.
(Definition of incident from the Cambridge Academic Content Dictionary © Cambridge University Press)
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