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Showing results for deep-sea. Search instead for deepsea/2.
Definitions

deep-sea

[deep-see] / ˈdipˈsi /
ADJECTIVE
marine
Synonyms
STRONGEST
aquatic coastal maritime naval saltwater seagoing
STRONG
littoral nautical oceanic sea seafaring seashore seaside shore
WEAK
Neptunian abyssal hydrographic natatorial navigational ocean-going oceanographic pelagic
Antonyms
WEAK
freshwater
ADJECTIVE
marine/maritime
Synonyms
WEAK
Neptunian abyssal aquatic coastal hydrographic littoral natatorial nautical naval navigational oceangoing oceanic oceanographic of the sea pelagic saltwater sea seafaring seagoing seashore seaside shore
ADJECTIVE
maritime
Synonyms
STRONGEST
aquatic marine naval oceangoing seafaring seagoing
WEAK
oceanic pelagic
ADJECTIVE
nautical
Synonyms
STRONGEST
maritime navigational seafaring
STRONG
marine
WEAK
abyssal aquatic boating cruising naval navigating oceangoing oceanic oceanographic pelagic rowing sailing sailorly salty sea-loving seagoing ship thalassic yachting
ADJECTIVE
nautical/naval
Synonyms
WEAK
abyssal aquatic boating cruising marine maritime navigating navigational oceangoing oceanic oceanographic pelagic rowing sailing sailorly salty sea-loving seafaring seagoing thalassic yachting
ADJECTIVE
thalassic
Synonyms
WEAK
Neptunian abyssal aquatic coastal hydrographic littoral maritime natatorial nautical naval navigational oceangoing oceanic oceanographic of the sea pelagic saltwater sea seafaring seagoing seashore seaside shore

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

She did not expect this observation to lead her into the study of deep-sea microbial mats.

From Science Daily • Apr. 3, 2026

He had met Kaye online and, calling himself Rob, told her he was a deep-sea diver "looking for a wife".

From BBC • Feb. 12, 2026

Chinese projects in Balochistan include a deep-sea port and an airport.

From The Wall Street Journal • Feb. 9, 2026

As the inventory progressed, scientists noticed that deep-sea communities changed naturally over time, likely in response to shifts in how much food reached the ocean floor.

From Science Daily • Feb. 2, 2026

Abbey and I hid nearby, on one of the deep-sea charter boats.

From "Flush" by Carl Hiaasen

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.