Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

See What's Trending Now See More Trending Words

deep-sea

adjective \ ˈdēp-ˈsē \

Definition of deep-sea

:of, relating to, or occurring in the deeper parts of the sea
  • deep-sea fishing

See deep-sea defined for English-language learners

See deep-sea defined for kids

Explore Merriam-Webster

alt-59e8af1b31525
Trending: NY Times: Trump's Call Ignites 'Imbroglio'
video-title-words-of-the-year-1066
Words of the Year: 1066
alt-59e900afadac6
The Synonyms 'Discover' and 'Invent'
tycoon
17 English Words that Come From Japanese

First Known Use of deep-sea

1626

deep-sea Synonyms

Synonyms
blue-water, oceanic, pelagic
Related Words
deepwater; marine, maritime, nautical
Near Antonyms
littoral

DEEP-SEA Defined for English Language Learners

deep-sea

adjective

Definition of deep-sea for English Language Learners

  • : living in, relating to, or done in the deep parts of the ocean

Learn More about deep-sea

  1. See words that rhyme with deep-sea Thesaurus: All synonyms and antonyms for deep-sea

Seen and Heard

What made you want to look up deep-sea? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

knee-jerk

play

readily predictable

Get Word of the Day daily email!

TRENDING NOW

  1. imbroglio "a public scandal"

  2. spurious of a deceitful nature or quality

  3. righteous We provide an assortment of definitions

  4. Kafkaesque 'A nightmarish quality'

  5. mike "microphone"

SEE ALL

BROWSE DICTIONARY

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

alt-59e900afadac6
The Synonyms 'Discover' and 'Invent'

In the past, you could invent fruit.

alt-59e8c3440f453
I'll Have the Us(ual)

Shortening 'usual': easy to say, hard to spell

alt-59e77dc36c593
The Origins of 'Lobbyist'

From the front hallways to the back rooms

alt-59e673567065d
The History of the Word 'Terrorism'

Noah Webster first entered the term in 1840

Ask the Editors

video-title-words-of-the-year-1066
Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

payday
How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

one-green-toy-robot-amidst-many-red-toy-robots
The Exceptions Quiz III

Which of these things doesn't belong?

Take the quiz
knupfer-painting-solon-before-croesus
Forms of Government Quiz

Name that government! Or something like that.

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
SCRABBLE® Sprint
SCRABBLE® Sprint

SCRABBLE® fans, sharpen your skills!

Play the game