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STI

American

abbreviation

sexually transmitted infection: any infection that is characteristically transmitted by sexual contact and may either clear up or develop into a sexually transmitted disease.

Etymology

Origin of STI

First recorded in 1990–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Macquarie Capital has a 2026 year-end target of 4500 on the STI, which is down 0.5% at 4513.91.

From The Wall Street Journal • Dec. 5, 2025

“We will keep fighting this cruel law so that everyone can get birth control, STI testing and treatment, cancer screenings and other critical health care, no matter their insurance,” she said.

From Salon • Jul. 28, 2025

That includes gay and bisexual men and people who have had an STI in the past.

From BBC • Mar. 24, 2025

Unpacking STI trends using genomic surveillance could help identify high-risk areas or populations and inform targeted public health strategies to break the chains of transmission.

From Science Daily • Sep. 16, 2023

XVth century, in the Royal Private Library at Stuttgart, iii 37 ---- 8vo., in the Emperor's private collection at Vienna, iii 386 ---- STI.

From A Bibliographical, Antiquarian and Picturesque Tour in France and Germany, Volume One by Dibdin, Thomas Frognall

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023