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  1. About Sexually Transmitted Infections (STIs) | STI | CDC

    Mar 25, 2024 · Sexually transmitted infections (STIs), also known as sexually transmitted diseases (STDs), are very common. Millions of new infections occur every year in the United …

  2. STD Definition & Meaning - Merriam-Webster

    : any of various diseases (as syphilis and gonorrhea) that are usually transmitted by direct sexual contact and that include some (as hepatitis and AIDS) that may be contracted by other than …

  3. Sexually Transmitted Diseases (STD): Complete Guide | Ada

    Jul 23, 2025 · STD stands for sexually transmitted disease. This is an umbrella term for a number of conditions that are caused by viruses, bacteria, and parasites that get transferred from one …

  4. Sexually transmitted infection - Wikipedia

    A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, …

  5. Sexually Transmitted Diseases (STDs): Causes, Tests, & Treatment - WebMD

    Oct 14, 2024 · STDs are sexually transmitted diseases. This means they are most often, but not exclusively, spread by sexual contact. STDs used to be called venereal diseases (VD). …

  6. Sexually Transmitted Diseases (Overview) - Harvard Health

    Sep 26, 2024 · Sexually transmitted diseases (STDs) are infections that are spread from person to person through sexual contact, including oral sex, anal sex and the sharing of sex toys.

  7. STD Definition & Meaning | Britannica Dictionary

    STD is an abbreviation for “sexually transmitted disease.”

  8. STDs: What Should I Know? - Valley Health

    STD stands for sexually transmitted disease, and it spreads when people have sexual contact or exchange bodily fluids. This can happen through kissing or more intimate acts like vaginal, …

  9. STD noun - Definition, pictures, pronunciation and usage notes

    STD noun /ˌɛs ti ˈdi/ the abbreviation for‘sexually transmitted disease’(a disease that is passed from one person to another during sexual activity)

  10. What Does STD Stand For? All STD Meanings Explained

    STD commonly refers to Sexually Transmitted Disease, which encompasses infections transmitted through sexual contact, including diseases such as chlamydia, gonorrhea, and …