American Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition STD in American English

STD noun

[countable] noun
/ˌes ti ˈdi/
1

sexually transmitted disease: any disease that you get from having sex with an infected person, for example AIDS or syphilis

Synonyms and related words
Definition STD in American English