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mother lode

mother lode

12 6.8
A large rich source of valuable things like gold or information
  • noun
  • /ˈmʌðər loʊd/
  • Informal
translation icon : filón
  • Thankfully, we have found the mother lode of all of the geysers, which is why there's a million people around this way.
  • hit the mother lode
  • strike a mother lode
  • discover the mother lode

And it was a massive mother lode of warheads.

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Examples

  • It is a world fraught with danger; but as with gold stocks, if you find the mother lode, you can be in for a very pleasant experience.

    Blog text (20)
  • After that, politics was the mother lode for this trio, and money, for most of the decade, was not a problem.

    Fiction book (2002)
  • And apparently, in doing so, we hit a mother lode of natural gas.

  • From Cavalli-Sforza's point of view, this ambitious project was the mother lode.

    Academic text (2006)
  • These are, for Becker, this this is the mother lode of psychological motivation.

  • A mother lode of rare coins, totally uncirculated, like they just came out of the mint.

  • Some conventions of dark fantasy offer a rich mother lode of fear-inducing techniques valuable to all fiction writers.

    Academic text (2010)
  • As Taleo CEO Michael Gregoire (who may retain that title as chief of an Oracle division) explained early in the webcast, Taleo is already the mother lode of employee talent data.

    Blog text (33)
  • Andrews and his team had stumbled onto the mother lode of dinosaur bones.

  • For scholars, the electronic archives of contemporary journalism are a mother lode of history.

Synonyms

gold mine
vsmother lode
  • Informal
21 3.2

A source of many useful things like information or money

is the same meaning but written as two separate words
lode
vsmother lode
  • Specialized
20 9.1

A rich vein of metal ore in the ground

is broader and applies to any principal source of value not only minerals
goldmine
vsmother lode
  • Informal
5 4.1

A rich source of useful things or information

is more tied to the figurative idea rather than the original mining vein
champion lode
vsmother lode
  • Archaic
9.9

The main rich vein of rock that has metal in a mine

is used more broadly for the main richest source beyond mining

How Rich

bonanza
25 7.1
mother lode
  • Informal
12 6.8
vein
  • Specialized
16 6.3
deposit
  • Specialized
78 3.5
trace
492 3.3

Surface Forms

mother lode singular
mother lodes plural

Morphology

mother + lode

The compound combines 'mother' (metaphorically used to mean origin or primary source) with 'lode' (a vein of valuable minerals), so a learner who knows both words can plausibly infer a meaning like 'the main/ richest source'. However, the use of 'mother' as an intensifier for 'main source' is a metaphorical extension and slightly idiomatic, so the relation is partly predictable but not fully literal.

Etymology

The phrase mother lode comes from old mining. Miners used mother and lode to mean the big vein of gold underground, the main source that gave most of the metal. That's why today 'mother lode' means the 'main' or 'richest source' of something valuable.