1. A person or thing from which something comes into being or is derived or obtained: alternative sources of energy; the source of funding for the project.
2. The point of origin of a stream or river. See Synonyms at origin.
3. One, such as a person or document, that supplies information: Reporters are only as reliable as their sources.
4. Physics The point or part of a system where energy or mass is added to the system.
tr.v. sourced, sourc·ing, sourc·es
1. To specify the origin of (a communication); document: The report is thoroughly sourced.
2. To obtain (materials or parts) from another business, country, or locale for manufacture: They sourced the spoke nuts from our company.
3. To outsource or insource (tasks or jobs, for example).
[Middle English, from Old French sourse, from feminine past participle of sourdre, to rise, from Latin surgere; see SURGE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.