incident

noun

• an event or occurrence:several amusing incidents
• a violent event, such as a fracas or assault:one person was stabbed in the incident
• a hostile clash between forces of rival countries.
• (incident of) a case or instance of something happening:a single incident of rudeness does not support a finding of contemptuous conduct
• the occurrence of dangerous or exciting things:the winter passed without incident
• a distinct piece of action in a play or a poem.

adjective

• 1 [predic.] (incident to) likely to happen because of; resulting from:the changes incident to economic development
• Law attaching to:the costs properly incident to a suit for foreclosure or redemption

• 2(especially of light or other radiation) falling on or striking something:when an ion beam is incident on a surface
• of or relating to incidence:the incident angle