sexually transmitted disease - definition and synonyms

noun [countable/uncountable] medical 

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/ˌsekʃuəli trænsˌmɪtɪd dɪˈziːz/
singularsexually transmitted disease
pluralsexually transmitted diseases

or sexually transmitted infection 

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  1. any disease that you get from having sex with an infected person, for example AIDS or syphilis