STI
noun
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
Examples of STI in a Sentence
Recent Examples on the Web
The panel issues key recommendations on cancer screenings, STI testing, counseling and other preventive services.
—
Alexandra Banner, CNN Money, 4 Mar. 2026
The vast majority focus on STI testing and treatment, contraceptive services, and cancer screenings.
—Fiorella Valdesolo, Allure, 3 Mar. 2026
Similarly, science is evolving for STI prevention options.
—Kenneth H. Mayer, STAT, 27 Feb. 2026
In the show, The Beauty is an STI that transforms a person into someone physically perfect, but with deadly consequences.
—Barry Levitt, Time, 22 Jan. 2026
Experts told Flow Space that these approvals are major shots across the bow in the fight against increasing STI rates.
—Helen Carefoot, Flow Space, 30 Dec. 2025
The Mecklenburg County Public Health Department has also provided STI testing and education to 54 individuals — some unhoused, others not.
—Briah Lumpkins, Charlotte Observer, 5 Dec. 2025
The latter includes the 2014 Subaru Impreza WRX STI, one of the last cars driven by Paul Walker in the Fast & Furious movies.
—Lydia Mansel, Travel + Leisure, 30 Nov. 2025
Only one of the five public health nurses needed to fully staff the STI clinic remains with the health department, a spokesperson said.
—Sarah Volpenhein, jsonline.com, 13 Nov. 2025
Examples are automatically compiled from online sources to
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Alexandra Banner, CNN Money, 4 Mar. 2026
The vast majority focus on STI testing and treatment, contraceptive services, and cancer screenings.
—Fiorella Valdesolo, Allure, 3 Mar. 2026
Similarly, science is evolving for STI prevention options.
—Kenneth H. Mayer, STAT, 27 Feb. 2026
In the show, The Beauty is an STI that transforms a person into someone physically perfect, but with deadly consequences.
—Barry Levitt, Time, 22 Jan. 2026
Experts told Flow Space that these approvals are major shots across the bow in the fight against increasing STI rates.
—Helen Carefoot, Flow Space, 30 Dec. 2025
The Mecklenburg County Public Health Department has also provided STI testing and education to 54 individuals — some unhoused, others not.
—Briah Lumpkins, Charlotte Observer, 5 Dec. 2025
The latter includes the 2014 Subaru Impreza WRX STI, one of the last cars driven by Paul Walker in the Fast & Furious movies.
—Lydia Mansel, Travel + Leisure, 30 Nov. 2025
Only one of the five public health nurses needed to fully staff the STI clinic remains with the health department, a spokesperson said.
—Sarah Volpenhein, jsonline.com, 13 Nov. 2025
Cite this Entry
“STI.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/STI. Accessed 11 Mar. 2026.
Copy CitationMedical Definition
STI
abbreviation or noun
: 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
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