prophylactic

1 of 2

adjective

pro·​phy·​lac·​tic ˌprō-fə-ˈlak-tik 

also

ˌprä- 

1

: guarding from or preventing the spread or occurrence of disease or infection

2

: tending to prevent or ward off : preventive

prophylactically

ˌprō-fə-ˈlak-ti-k(ə-)lē 

 also  ˌprä-

adverb

prophylactic

2 of 2

noun

: something prophylactic

especially : a device and especially a condom for preventing venereal infection or conception

Synonyms

Adjective

• precautionary
• preventative
• preventive

Examples of prophylactic in a Sentence

Adjective

the prophylactic use of antibiotics

the many prophylactic measures that city officials could have taken to reduce the scope of the disaster

Recent Examples on the Web

Adjective

Two main strategies to eradicate the virus exist: prophylactic vaccines, to prevent initial infection, and therapeutic vaccines, to help people already infected. —Dr. Tal Patalon, Md, Llb, Forbes, 14 Dec. 2024

With their current study, the researchers are seeking to shift the paradigm and adopt a more proactive, prophylactic approach to pain management. —New Atlas, 5 Dec. 2024

Noun

Malaria experts are very excited about monoclonals, especially as a prophylactic in parts of the world (like the Sahel region of Africa south of the Sahara) where malaria chiefly spreads in the rainy seasons that extend from roughly June to October. —Dylan Matthews, Vox, 7 Dec. 2018

May your heat protectants be as effective as your prophylactics — that is, around 98% when used perfectly. —Rachel Krause, refinery29.com, 9 Apr. 2024

Word History

Etymology

Adjective

borrowed from Medieval Latin prophylacticus, borrowed from Greek prophylaktikós, from prophylakt-, stem in nominal derivation of prophylássein "to keep guard before a place, be on guard, (middle voice) to be on one's guard against, take precautions against" + -ikos -ic entry 1 — more at prophylaxis

Noun

borrowed from Late Latin prophylacticon "protective measure against disease," borrowed from Late Greek prophylaktikón, noun derivative from neuter of Greek prophylaktikós prophylactic entry 1

First Known Use

Adjective

1574, in the meaning defined at sense 1

Noun

circa 1641, in the meaning defined above

Kids Definition

prophylactic

1 of 2 adjective

pro·​phy·​lac·​tic ˌprō-fə-ˈlak-tik 

1

: guarding from or preventing the spread or occurrence of disease or infection

2

: tending to prevent or ward off

prophylactic

2 of 2 noun

: something prophylactic

especially : a device and especially a condom for preventing infection or pregnancy

Medical Definition

prophylactic

1 of 2 adjective

pro·​phy·​lac·​tic

ˌprō-fə-ˈlak-tik also ˌpräf-ə-

1

: guarding from or preventing the spread or occurrence of disease or infection

prophylactic therapy

2

: tending to prevent or ward off : preventive

prophylactically

-ti-k(ə-)lē 

adverb

prophylactic

2 of 2 noun

: something (as a medicinal preparation) that is prophylactic

especially : a device and especially a condom for preventing venereal infection or conception

Legal Definition

prophylactic

adjective

pro·​phy·​lac·​tic ˌprō-fə-ˈlak-tik, ˌprä- 

: designed or tending to prevent harm or wrong

a prophylactic rule against profiting from inside information