- 1
A layer that lies underneath another.
- ..; in this case it became necessary to employ a machine like the lapidary's wheel, partially to grind away the colored surface till the white substratum appeared.
- 2
The underlying cause or basis of something.figuratively
- However exaggerated an estimate this might be, the substratum of truth was solid and auriferous enough to dazzle the imagination.
- 3
A substrate.
substratum
'sʌb'strɑ:tәm, 'sʌb'streitәm5 senses · 65 ms
Level C2GRE