proponent

American  

[pruh-poh-nuhnt] / prəˈpoʊ nənt /

noun

• proponents
  plural

1. a person who puts forward a proposition or proposal.

2. a person who argues in favor of something; an advocate.

   Synonyms:

   enthusiast, champion, supporter

3. a person who supports a cause or doctrine; adherent.

   Synonyms:

   enthusiast, champion, supporter

4. a person who propounds a legal instrument, such as a will for probate.

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proponent British  

/ prəˈpəʊnənt /

noun

1. a person who argues in favour of something

2. law a person who seeks probate of a will

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Other Word Forms

Noun Inflected Forms

• proponents
  plural

Etymology

Origin of proponent

First recorded in 1580–90, proponent is from the Latin word prōpōnent- (stem of prōpōnēns ). See propone, -ent

Explanation

Proponent means someone who is in favor of something. You might be a proponent of longer vacations, but your parents are proponents of a longer school year. If you’re in favor of long school vacations, you’re pro or "for" long vacations. The prefix pro- also carries the meaning of “forward,” “ahead,” or “before.” All of these senses are at work in proponent: someone who suggests (puts forward) an idea or who is in favor of an idea. A proponent proposes an idea or advocates for a proposal or a proposition.

Example Sentences

See Examples For:

proponent proponents

Even Leo Stein, the American expatriate proponent of avant-garde art, called it “brilliant and powerful, but the nastiest smear of paint I had ever seen.”

From The Wall Street Journal ● Jul. 25, 2026

Geiger, however, remains a huge proponent of the system and was careful not to criticize how it’s been used in this World Cup.

From Los Angeles Times ● Jul. 12, 2026

He was a strong proponent of US support for Ukraine.

From BBC ● Jul. 12, 2026

Salazar, who led Oregon’s state housing agency during the COVID-19 pandemic and later worked as a regional director for HUD, is a longtime proponent of the Low-Income Housing Tax Credit.

From Salon ● Jul. 4, 2026

In the 1970s, the famed Tyrolean alpinist Reinhold Messner emerged as the leading proponent of gasless climbing, declaring that he would ascend Everest “by fair means” or not at all.

From "Into Thin Air" by Jon Krakauer

The benefits of space-based data centers, proponents say, are that companies can avoid regulatory red tape and community backlash.

From MarketWatch ● Aug. 24, 2026

Many of its proponents wouldn’t know the history and many wouldn’t care: Our version will be better.

From The Wall Street Journal ● Aug. 6, 2026

And they’ve gotten smarter than the used-gum, spit-cup abstinence proponents of my youth.

From Slate ● Jul. 28, 2026

Inverter systems can cost thousands of dollars -- not dissimilar to petrol generators depending on the size -- but proponents say running costs are lower in the long run.

From Barron's ● Jul. 25, 2026

In order to justify this, proponents of this position insist that evidence is never discovered: it is always ‘constructed’ within a particular social community.

From "The Invention of Science" by David Wootton

Related Words

• advocate
• backer
• defender
• enthusiast
• exponent
• partisan
• patron
• protector
• supporter