Definition of incidence in English:


Line breaks: in¦ci|dence
Pronunciation: /ˈɪnsɪd(ə)ns


  • 1The occurrence, rate, or frequency of a disease, crime, or other undesirable thing: an increased incidence of cancer
    More example sentences
    • Trees can help reduce the incidence of respiratory diseases as well as lung cancer.
    • Panchayats should take the initiative to reduce the incidence of the disease at grass-root levels.
    • There are different skull shapes, different frequencies of blood types, different incidences of heritable diseases.
    occurrence, prevalence, commonness; rate, frequency; amount, degree, quantity, extent
  • 1.1The way in which the burden of a tax falls upon the population: the entire incidence falls on the workers
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    • For example, he treated the incidences of taxes on capital and land in lieu of examining the effects of a property tax per se.
    • Tax incidence is clearly an important issue - where does the burden really fall?
    • In practice, the eventual receipts of any party will be reduced by the incidence of income tax.
  • 2 [mass noun] Physics The intersection of a line, or something moving in a straight line, such as a beam of light, with a surface: the point of incidence of the beam
    More example sentences
    • Due to the glancing incidence of the ion beam, argon is not implanted into the sample surface.
    • With grazing incidence diffraction a monoclinic tilted chain lattice is found in the condensed phase.
    • The optical output to which a given beam travels depends on the beam's respective direction of incidence.


late Middle English (denoting a casual or subordinate event): from Old French, or from medieval Latin incidentia, from Latin incidere 'fall upon, happen to' (see incident). sense 1 dates from the early 19th century.

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