noun

1. a spring, fountain, etc. that is the starting point of a stream
2. that from which something comes into existence, develops, or derives the sun is our source of energy, the source of a difficulty
3. 1. any person, place, or thing by which something is supplied a source of pleasure
   2. a person, book, document, etc. that provides information to consult various sources
4. the point or thing from which light rays, sound waves, etc. emanate

Etymology: ME sours < OFr sourse < pp. of sourdre, to rise < L surgere: see surge

transitive verb, intransitive verb sourced, sourcing sourc′·ing

1. ☆ to obtain (parts, materials, etc.) from a source of supply
2. ☆ to identify the source of (information, quotations, etc.)