source Definition

source
noun

1. The place, thing, person, circumstance, etc that something begins or develops from; the origin.

Thesaurus: beginning, cause, root, origin, derivation, core, basis, fountainhead, spring.
2. A spring or place where a river or stream begins.
3a. A person, a book or other document that can be used to provide information, evidence, etc;

Thesaurus: informant, expert, specialist, authority, reference.
3b. Someone or something that acts as an inspiration, model, standard, etc, especially in the realms of creativity.

verb sourced, sourcing

1. To acknowledge or mention as a source.
2. To originate in someone or something.

Derivative: sourcing
noun

Idiom: at source

At the point of origin.

Etymology: 14c: from French sors, from Latin surgere to rise.