earth's surface is a noun meaning "the outermost level of the land or sea". It carries one recorded sense.
the outermost level of the land or sea
“earthquakes originate far below the surface”
“three quarters of the Earth's surface is covered by water”
Definitions, synonyms and semantic relations for earth's surface come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.