Antonyms of adj subterranean

2 senses of subterranean

Sense 1
subterranean, subterraneous -- (being or operating under the surface of the earth; "subterranean passages"; "a subsurface flow of water")

INDIRECT (VIA surface, subsurface) -> overhead -- (located or originating from above; "an overhead crossing")
INDIRECT (VIA subsurface, overhead) -> surface -- (on the surface; "surface materials of the moon")

Sense 2
subterranean, subterraneous, ulterior -- (lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed); "subterranean motives for murder"; "looked too closely for an ulterior purpose in all knowledge"- Bertrand Russell)

INDIRECT (VIA covert) -> overt, open -- (open and observable; not secret or hidden; "an overt lie"; "overt hostility"; "overt intelligence gathering"; "open ballots")

Similarity of adj subterranean

2 senses of subterranean

Sense 1
subterranean, subterraneous -- (being or operating under the surface of the earth; "subterranean passages"; "a subsurface flow of water")
       => subsurface (vs. overhead) (vs. surface) -- (beneath the surface; "subsurface materials of the moon")

Sense 2
subterranean, subterraneous, ulterior -- (lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed); "subterranean motives for murder"; "looked too closely for an ulterior purpose in all knowledge"- Bertrand Russell)
       => covert (vs. overt) -- (secret or hidden; not openly practiced or engaged in or shown or avowed; "covert actions by the CIA"; "covert funding for the rebels")

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