STI

noun

ˌes-ˌtē-ˈī 

plural STIs

: any of various diseases or infections (such as gonorrhea, genital herpes, chlamydia, hepatitis B, or HIV) that are typically transmitted by direct sexual contact but may sometimes be spread by nonsexual means (such as childbirth or sharing needles)

called also STD

Word History

Etymology

sexually transmitted infection

First Known Use

1983, in the meaning defined above

Medical Definition

STI

abbreviation or noun

ˌes-(ˌ)tē-ˈī 

: any of various diseases or infections (such as gonorrhea, genital herpes, chlamydia, hepatitis B, or HIV) that are typically transmitted by direct sexual contact but may sometimes be spread by nonsexual means (such as childbirth or sharing needles)

called also STD