Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

incidence

play
noun in·ci·dence \ˈin(t)-sə-dən(t)s, -ˌden(t)s\

Simple Definition of incidence

  • : the number of times something happens or develops : the rate at which something occurs

  • : the angle at which a ray (such as a ray of light) hits a surface

Full Definition of incidence

  1. 1 a :  angle of incidence b :  the arrival of something (as a projectile or a ray of light) at a surface

  2. 2 a :  an act or the fact or manner of falling upon or affecting :  occurrence b :  rate of occurrence or influence <a high incidence of crime>

Examples of incidence

  1. an increased incidence of diabetes

  2. a high incidence of criminal behavior



1626

First Known Use of incidence

1626


Medical Dictionary

incidence

play
noun in·ci·dence \ˈin(t)-səd-ən(t)s, -sə-ˌden(t)s\

Medical Definition of incidence

  1. 1a:  angle of incidenceb:  the arrival of something (as a ray of light) at a surface

  2. 2a:  an act or the fact or manner of occurring or affecting <diseases of domestic incidenceScience>b:  rate of occurrence or influence; especially :  the rate of occurrence of new cases of a particular disease in a population being studied—compare prevalence




Learn More about incidence


Seen and Heard

What made you want to look up incidence? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

100 pounds 16.96 pounds 2.2 pounds 196.5 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ