source n1: a point of originthe source of the conflict2: one that supplies informationheld the reporter in contempt for refusing to reveal her source
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.
ancestry, authority, basis, beginning, caput, cause, cradle, derivation, fons, font, foundation, fount, fountain, fountainhead, generator, genesis, germ, headspring, incunabula, informant, inspiration, lineage, motive, origin, original, origination, origo, parent, parentage, place, provenance, provenience, root, spring, springhead, stem, well, wellhead, wellspring
associated concepts: source of income, source of information
authority (power), basis, cause (reason), citation (attribution), connotation
determinant, documentation, embryo, genesis, inception, informant, informer (a person who provides information), onset (commencement), origination, parentage, progenitor, prototype, reason (basis), reference (citation), resource, spy, start
Burton's Legal Thesaurus. William C. Burton. 2006
n.Origin; the place or person from which something comes; the person or thing that starts something.
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.