variants
or less commonly sub-sea
1
: existing or occurring below the surface of the sea
subsea currents
The island, an upthrust of volcanic rock, lies along the Norfolk Ridge, an 1,100-mile line of subsea mountains.—
Michael Davie
Michael Davie2
: existing or occurring under the seafloor
subsea oil wells
Cite this Entry
“Subsea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subsea. Accessed 31 Oct. 2025.
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