primary source

American  

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

noun

1. a first-hand or original account.

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Example Sentences

However, Arm’s CPU doesn’t appear to be a direct competitor with Nvidia’s graphics-processing units, which are the primary source of revenue for the company.

From Barron's • Mar. 25, 2026

"You had listened to the most primary source you could," Sherborne said.

From BBC • Mar. 3, 2026

We know in 1845, potato fields — the primary source of food for the poor — became infested with a devastating fungus that destroyed 40% of the crop.

From Los Angeles Times • Jan. 24, 2026

"Phytoplankton are the primary source of food for krill, the microscopic shrimp that are the main source of food in the Southern Ocean for virtually every animal, including penguins, seals, walruses and whales," Falkowski said.

From Science Daily • Jan. 12, 2026

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

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