What does "secondary source" mean?

A written commentary which discusses previously produced original work of another author, especially a notable author.

Secondary source

Common synonyms include: ancient history resources, more historical sources, source evidence, written history sources.

noun

noun ·Rare ·Advanced level

Noun

1
A written commentary which discusses previously produced original work of another author, especially a notable author.
2
A study of past events or a past author written from the perspective of a later period of time; a document that draws on one or more historical primary sources and interprets or analyses them, including documents such as newspapers whose accuracy is open to question.