noun
[ usually sing. ] ( especially NAmE ) a very rich source of gold, silver, etc. in a mine :
( figurative )
Her own experiences have provided her with a mother lode of material for her songs.
noun
[ usually sing. ] ( especially NAmE ) a very rich source of gold, silver, etc. in a mine :
( figurative )
Her own experiences have provided her with a mother lode of material for her songs.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005