Definitions

1. noun

the part of the Earth’s surface below the surface or the bottom of a body of water, or the area beneath the surface of something.

“The subsurface exploration team discovered a new underground water source.”

2. adjective

extending or occurring below the surface, especially of the Earth or a body of water.

“The subsurface geology of the area is complex and difficult to map.”

3. verb

to find or explore something below the surface, especially of the Earth or a body of water.

“The scientists subsurface the area to find evidence of the ancient civilization.”