Noun
Something that is below the layer that is on the surface.
- Examples
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Before we could lay the flooring we had to lay a subsurface under it to keep it flat and support it.
A surface which is a submanifold of another surface.
Usage- Countable
Adjective
Below the surface.
Usage- not-comparable
- Examples
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variations in subsurface conditions
Adjective
beneath the surface
- Examples
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subsurface materials of the moon