PRECURSOR Synonyms: 54 Similar and Opposite Words

Q: How is the word 'precursor' distinct from other similar nouns?

Some common synonyms of precursor are forerunner , harbinger , and herald . While all these words mean "one that goes before or announces the coming of another," precursor applies to a person or thing paving the way for the success or accomplishment of another. // 18th century poets like Burns were precursors of the Romantics

Q: In what contexts can 'forerunner' take the place of 'precursor'?

The words forerunner and precursor are synonyms, but do differ in nuance. Specifically, forerunner is applicable to anything that serves as a sign or presage. // the blockade was the forerunner of war

Q: How are the words 'harbinger' and 'herald' related as synonyms of 'precursor'?

Harbinger and herald both apply, chiefly figuratively, to one that proclaims or announces the coming or arrival of a notable event. // their early victory was the harbinger of a winning season // the herald of a new age in medicine

precursor

noun

pri-ˈkər-sər

Definition of precursor

as in forerunner

one that announces or indicates the later arrival of another 18th-century lyric poets like Robert Burns were precursors of the Romantics

Synonyms & Similar Words

Relevance

as in ancestor

something belonging to an earlier time from which something else was later developed a precursor of the modern eggplant

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How is the word precursor distinct from other similar nouns?

Some common synonyms of precursor are forerunner, harbinger, and herald. While all these words mean "one that goes before or announces the coming of another," precursor applies to a person or thing paving the way for the success or accomplishment of another.

18th century poets like Burns were precursors of the Romantics

In what contexts can forerunner take the place of precursor?

The words forerunner and precursor are synonyms, but do differ in nuance. Specifically, forerunner is applicable to anything that serves as a sign or presage.

the blockade was the forerunner of war

How are the words harbinger and herald related as synonyms of precursor?

Harbinger and herald both apply, chiefly figuratively, to one that proclaims or announces the coming or arrival of a notable event.

their early victory was the harbinger of a winning season

the herald of a new age in medicine

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of precursor To fix the chemical interference, the research team added a decoupling modulator molecule featuring ammonium ions, iodide ions, and two sulfonate groups to the precursor solution. — Mrigakshi Dixit, Interesting Engineering, 26 Oct. 2026 Ancient Celtic druids would hold the celebration of Samhain — the precursor to Halloween — when the star cluster reached its highest point in the autumn night sky at midnight. — Anthony Wood, Space.com, 24 Oct. 2026 In September, Kirk's family filed a notice of claim, which is a precursor to a lawsuit. — Michael Ruiz, FOXNews.com, 23 Oct. 2026 Should tens of thousands of American lives have been saved as a result of decisions made about fentanyl precursors in China, the implications are massive. — J. Travis Donahoe, STAT, 23 Oct. 2026 See All Example Sentences for precursor

Recent Examples of Synonyms for precursor

Noun

He is revered in the Christian church as the forerunner of Jesus.

— Encyclopedia Britannica, Encyclopedia Britannica, 30 Oct. 2026
Koslow’s screen career began in 1976 as the writer of the film Lifeguard, a ’70s-era Baywatch forerunner starring a hunky Sam Elliott and Anne Archer.

— Tom Tapp, Deadline, 19 Oct. 2026

Definition of forerunner

Noun

Throughout the region, remains of 5,500 ancestors that were displaced have been made available for return to the Tohono O’odham Nation, according to ProPublica’s NAGPRA database.

— Ryan Devereaux, ProPublica, 2 Nov. 2026
Today, this Chilean territory is essentially an open-air archaeological museum, with many of its enigmatic moai (representations of Polynesian ancestors) returned to their upright positions following seven decades of restoration.

— Mark Johanson, Condé Nast Traveler, 30 Oct. 2026

Definition of ancestor

Noun

Destras notes that the virus may have spent several weeks incubating and multiplying in the patient before the neurological symptoms appeared.

— Sahas Mehra, Scientific American, 28 Oct. 2026
Stages range from stage 0, which may not have visible symptoms, to stage 3, characterized by extreme swelling, with hard or thick skin and potentially decreased mobility, the NCI says.

— ABC News, ABC News, 28 Oct. 2026

Definition of symptom

Noun

The comedy-drama heralds from Adeel Ahmed and writer-director Batra’s film and TV outfit Poetic License, and is being produced in partnership with Jio Studios (Dhurandhar), and Good Chaos (Ballad Of A Small Player).

— Andreas Wiseman, Deadline, 26 Oct. 2026
Chain bookselling, which enabled the unification of the reading market, was one of the first heralds of a globalizing age.

— Nathan Heller, New Yorker, 19 Oct. 2026

Definition of herald

Noun

Every year after Halloween, Spirit Halloween’s stores empty out and the signs come down.

— Catherina Gioino, Fortune, 24 Oct. 2026
One particularly promising example is an MRI technique that identifies the central vein sign, a feature that can help physicians distinguish lesions associated with MS from abnormalities caused by other conditions.

— Bruce Bebo, STAT, 24 Oct. 2026

Definition of sign

Noun

Its website lists celebrity angel investors, including Gwyneth Paltrow, Cameron Diaz, Demi Moore and Drew Barrymore.

— Corey G. Johnson, ProPublica, 29 Oct. 2026
On October 24, 2026, Us Weekly first reported that Brady is dating Victoria’s Secret angel Candice Swanepoel.

— Giovana Gelhoren, InStyle, 28 Oct. 2026

Definition of angel

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preconditions

precursor

precursors

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“Precursor.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/precursor. Accessed 4 Nov. 2026.

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