- Mining. a rich or important lode.
- a major or profitable source or supply: New York City is a mother lode of actors.
Origin of mother lode
Examples from the Web for mother lode
Historical Examples of mother lode
The day following his locating of the mother-lode, Pant worked feverishly.
His hopes of reaching the mother-lode of this mine vanished.
Everybody in the cavern smiled, and I daresay if the truth were known we had discovered the mother-lode of comedy.Caves of Terror
- mining the principal lode in a system