prevalencePronunciation: /ˈprɛv(ə)l(ə)ns, ˈprɛvəl(ə)ns, ˈprɛvələns/Translate prevalence | into German | into Italian | into Spanish Definition of prevalence noun [mass noun] the fact or condition of being prevalent; commonness:the prevalence of obesity in adultsprevalence in other Oxford dictionaries Definition of prevalence in the US English dictionary