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English definition of “incidence”

incidence

noun

incidence noun (RATE)

   /ˈɪn·sə·dəns, -ˌdens/ [U] the rate at which something happens: There’s been an increased incidence of cancer in the area.

incidence noun (SURFACE)

 /ˈɪn·səd·əns, -səˌdens/ [C] the falling or hitting of an object or beam of energy, such as light, on a surface angle of incidence physics The angle of incidence is the angle that a beam of light or other energy hitting a surface makes with a line vertical to that surface.
(Definition of incidence from the Cambridge Academic Content Dictionary © Cambridge University Press)
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