What is the meaning of mother lode?

noun

WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). mother lode. Retrieved September 26, 2026, from http://smartdefine.org/mother_lode/definitions/1235524
ChicagoWordNet. 2010. "mother lode" http://smartdefine.org/mother_lode/definitions/1235524 (accessed September 26, 2026).
HarvardWordNet 2010, mother lode, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/mother_lode/definitions/1235524>.
MLAWordNet. "mother lode" 23 October 2010. Web. 26 September 2026. <http://smartdefine.org/mother_lode/definitions/1235524>