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Definitions

prophylaxis

[proh-fuh-lak-sis, prof-uh-] / ˌproʊ fəˈlæk sɪs, ˌprɒf ə- /
NOUN
precaution
Synonyms


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.

Merck currently has four HIV drug development programs including a once-daily oral treatment, two once-weekly oral treatments, and a once-monthly oral pre-exposure prophylaxis that’s meant to prevent HIV infection.

From Barron's • Feb. 25, 2026

I started off pretty skeptical about echinacea, but actually, I’m an author on studies showing that echinacea reduces antibiotic usage by about 70 percent in children if they use it as a prophylaxis.

From Slate • Oct. 8, 2025

It is hoped it will replace the current form of HIV preventative drug, know as PrEP, or pre-exposure prophylaxis, which is taken orally and also costs $40 per person each year.

From BBC • Sep. 24, 2025

That work has included ramping up HIV testing and PrEP, or preexposure prophylaxis, programs, as well as expanding care for transgender people living with the virus.

From Seattle Times • Sep. 10, 2023

Her secret prophylaxis was a white bag, filled and saturated with camphor, which she kept hidden in her bosom.

From "Cheaper by the Dozen" by Frank B. Gilbreth Jr. and Ernestine Gilbreth Carey




Vocabulary lists containing prophylaxis