primary source

[prahym-er-ee sawrs, sohrs] / ˈpraɪm ɛr i ˈsɔrs, ˈsoʊrs /

NOUN

text, account, source others are based on

Synonyms

STRONG

eyewitness eyewitness account first-hand first-hand account first-hand report horse's mouth immediate source on-the-scene report on-the-scene reporter original account original source original text source text text of origin unmediated account

WEAK

observer witness

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.

See Examples For:

primary source

A primary source of pressure on margins for Apple is the rising cost of memory components.

From MarketWatch ● Sep. 25, 2026

The staffer said that examiners were no longer allowed to access the primary source level data and could only “check the checker now,” meaning they must rely on a company’s own findings.

From Salon ● Sep. 1, 2026

Nectar supplies mostly sugar, while pollen is their primary source of protein.

From Science Daily ● Aug. 19, 2026

Beijing wants non-fossil energy to become the primary source of electricity generation by 2030.

From The Wall Street Journal ● Jul. 19, 2026

But GSS’s primary source of income came from teleportation fares.

From "Ready Player One: A Novel" by Ernest Cline

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