proponent

noun

pro·​po·​nent prə-ˈpō-nənt 

ˈprō-ˌpō-

: one who argues in favor of something : advocate

Did you know?

Proponent comes from the same Latin word as propose, so a proponent is someone who proposes something, or at least supports it by speaking and writing in favor of it. Thus, for example, proponents of casinos argue that they create jobs, whereas proponents of a casino ban—that is, casino opponents—argue that they're corrupting and they take money away from people who can't afford it. As a rule, just about anything important that gets proposed also gets opposed.

Synonyms of proponent

• advocate
• supporter
• advocator
• exponent

Examples of proponent in a Sentence

a vocal proponent of the use of electric-powered cars

Recent Examples on the Web

Protesters view Fedorov, a proponent of technology and drone warfare, as representing a vital, modern strategy to conserve lives amidst manpower shortages, contrasting with older military approaches. — David Kirichenko, Forbes.com, 17 Aug. 2026

On Monday, the act gained its highest-profile proponent yet when New York City mayor Zohran Mamdani announced his support for the legislation. — Glenn Taylor, Footwear News, 13 Aug. 2026

Andrew Sweetman, the Scottish marine biogeochemist who led the work, hadn’t made such claims, but he was still pilloried by fellow-scientists, and proponents of mining accused him of being an anti-mining crusader. — James Dinneen, New Yorker, 13 Aug. 2026

The proponents of those ideas believe that spreading them can shift the boundaries of debate — that nothing else will do so in a media environment where conservatives hold enormous power. — David Weigel, semafor.com, 12 Aug. 2026

Word History

Etymology

Latin proponent-, proponens, present participle of proponere

First Known Use

1588, in the meaning defined above

Rhymes for proponent

• component
• deponent
• exponent
• opponent
• multicomponent
• ponent

Kids Definition

proponent

noun

pro·​po·​nent prə-ˈpō-nənt 

ˈprō-ˌpō-nənt

: one who argues in favor of something

a proponent of recycling

Legal Definition

proponent

noun

pro·​po·​nent prə-ˈpō-nənt 

1

: one who argues in favor of something

2

: one who offers a will for probate