- (modifier) of, found in, or characteristic of the deep parts of the sea
WordReference Random House Learner's Dictionary of American English © 2026
ˈdeep-ˈsea,
adj. [before a noun]
WordReference Random House Unabridged Dictionary of American English © 2026- Oceanographyof or relating to the deeper parts of the sea:deep-sea fishing.
deep-sea
(dēp′sē′),USA pronunciation adj.
- Oceanographyof, pertaining to, in, or associated with the deeper parts of the sea:deep-sea fishing; deep-sea diver.
- 1620–30
Collins Concise English Dictionary © HarperCollins Publishers::
deep-sea n
'deep-sea' also found in these entries (note: many are not synonyms or translations):
bathysphere
- grenadier
- lifeline
- opah
- ribbonfish
- umbilical cord
- wolffish
- aeroembolism
- air-line
- big game
- blue mud
- bristlemouth
- brotula
- charter
- creole-fish
- deep
- deep-sea core
- haaf
- hatchetfish
- hydronaut
- island arc
- lanternfish
- lead line
- louvar
- mark
- nitrogen narcosis
- pearleye
- Piccard
- profound
- ragfish
- red clay
- trophosome
- viperfish
- snake mackerel