deep

[ deep ]

/ dip /

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See synonyms for: deep / deeper / deepest on Thesaurus.com

adjective, deep·er, deep·est.

extending far down from the top or surface: a deep well;a deep valley.

extending far in or back from the front or from an edge, surface, opening, etc., considered as the front: a deep shelf.

extending far in width; broad: deep lace;a deep border.

ranging far from the earth and sun: a deep space probe.

having a specified dimension in depth: a tank 8 feet deep.

covered or immersed to a specified depth (often used in combination): standing knee-deep in water.

having a specified width or number of items from front to back (often used in combination): shelves that are 10 inches deep;cars lined up at the entrance gates three-deep.

extending or cutting far down relative to the surface of a given object:The knife made a deep scar in the table.

situated far down, in, or back: deep below the surface;deep in the woods.

reaching or advancing far down: a deep dive.

coming from far down: a deep breath.

made with the body bent or lowered to a considerable degree: a deep bow.

immersed or submerged in or heavily covered with (followed by in): a road deep in mud.

difficult to penetrate or understand; abstruse: a deep allegory.

not superficial; profound: deep thoughts.

grave or serious: deep disgrace.

heartfelt; sincere: deep affections.

absorbing; engrossing: deep study.

great in measure; intense; extreme: deep sorrow.

sound and heavy: deep sleep.

(of colors) dark and vivid: a deep red.

low in pitch, as sound, a voice, or the like: deep, sonorous tones.

having penetrating intellectual powers: a deep scholar.

profoundly cunning or artful: a deep and crafty scheme.

mysterious; obscure: deep, dark secrets.

immersed or involved; enveloped: a man deep in debt.

absorbed; engrossed: deep in thought.

Baseball. relatively far from home plate: He hit the ball into deep center field.

Linguistics. belonging to an early stage in the transformational derivation of a sentence; belonging to the deep structure.

noun

the deep part of a body of water, especially an area of the ocean floor having a depth greater than 18,000 feet (5,400 meters).

a vast extent, as of space or time.

the part of greatest intensity, as of winter.

Nautical. any of the unmarked levels, one fathom apart, on a deep-sea lead line.Compare mark¹ (def. 20).

the deep, Chiefly Literary. the sea or ocean: He was laid to rest in the deep.

adverb, deep·er, deep·est.

to or at a considerable or specified depth: The boat rode deep in the water.

far on in time: He claimed he could see deep into the future.

profoundly; intensely.

Baseball. at or to a deep place or position: The outfielders played deep, knowing the batter's reputation as a slugger.

OTHER WORDS FOR deep

14 recondite, mysterious, obscure.

23 sagacious, wise, intelligent, shrewd.

See synonyms for deep on Thesaurus.com

OPPOSITES FOR deep

1, 10 shallow.

See antonyms for deep on Thesaurus.com

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His boss, whom he admires, is waiting to meet with him about the big project.

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Idioms about deep

go off the deep end,

to enter upon a course of action with heedless or irresponsible indifference to consequences.
to become emotionally overwrought.

in deep,

inextricably involved.
having made or committed oneself to make a large financial investment.

in deep water,

in difficult or serious circumstances; in trouble.
in a situation beyond the range of one's capability or skill: You're a good student, but you'll be in deep water in medical school.

Origin of deep

First recorded before 900; Middle English dep, Old English dēop; akin to Gothic diups, Old Norse djupr, Dutch diep, Old High German tiof; akin to dip¹, dive

OTHER WORDS FROM deep

deep·ness, nounnon·deep, adjectiveo·ver·deep, adjectiveun·deep, adjective

un·deep·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use deep in a sentence

He said that the NYPD will be in deepest mourning this Christmas season.
Two Cops ‘Assassinated’ in Brooklyn|Michael Daly|December 21, 2014|DAILY BEAST
“My deepest apologies for not writing sooner,” he began his letter to her by saying.
A West Point MVP Who Never Played a Down|Nicolaus Mills|December 13, 2014|DAILY BEAST
But at midnight the deepest penetration on Omaha was barely more than a mile.
Blood in the Sand: When James Jones Wrote a Grunt’s View of D-Day|James Jones|November 15, 2014|DAILY BEAST
I had been poor too long, I was drinking a lot, I was beginning to doubt, in the deepest of ways, the wisdom of my choice of job.
The Stacks: How The Berlin Wall Inspired John le Carré’s First Masterpiece|John le Carré|November 8, 2014|DAILY BEAST

Send a postcard to PostSecret and your deepest thoughts could end up on a blog.
Your Sex Confession Is Her Screenplay|Samantha Allen|October 29, 2014|DAILY BEAST
Mr. Pickwick—deepest obligations—life preserver—made a man of me—you shall never repent it, sir.
The Posthumous Papers of the Pickwick Club, v. 2(of 2)|Charles Dickens
As you have already been told, Yung Pak had from his earliest days been taught the deepest reverence and honour for his father.
Our Little Korean Cousin|H. Lee M. Pike
That is one of my deepest convictions, and I shall try very hard to prove that it is just.
God and my Neighbour|Robert Blatchford
The deepest silence prevailed around, and I listened to it, if I may use the expression, with a sort of respect.
Madame Roland, Makers of History|John S. C. Abbott
No one with even an ordinary share of sensibility can witness a ceremony involving such consequences without the deepest emotion.
Madame Roland, Makers of History|John S. C. Abbott

British Dictionary definitions for deep

deep

/ (diːp) /

adjective

extending or situated relatively far down from a surfacea deep pool

extending or situated relatively far inwards, backwards, or sidewaysa deep border of trees

cricket relatively far from the pitchthe deep field; deep third man

(postpositive) of a specified dimension downwards, inwards, or backwardssix feet deep
(in combination)a six-foot-deep trench

coming from or penetrating to a great deptha deep breath

difficult to understand or penetrate; abstruse

learned or intellectually demandinga deep discussion

of great intensity; extremedeep happiness; deep trouble

(postpositive foll by in) absorbed or enveloped (by); engrossed or immersed (in)deep in study; deep in debt

very cunning or crafty; deviousa deep plot

mysterious or obscurea deep secret

(of a colour) having an intense or dark hue

low in pitch or tonea deep voice

go off the deep end informal

to lose one's temper; react angrily
mainly US to act rashly

in deep water in a tricky position or in trouble

throw someone in at the deep end See end 1 (def. 28)

noun

any deep place on land or under water, esp below 6000 metres (3000 fathoms)

the deep

a poetic term for the ocean
cricket the area of the field relatively far from the pitch

the most profound, intense, or central partthe deep of winter

a vast extent, as of space or time

nautical one of the intervals on a sounding lead, one fathom apart

adverb

far on in time; latethey worked deep into the night

profoundly or intensely

deep down informal in reality, esp as opposed to appearanceshe is a very kind person deep down

deep in the past long ago

Derived forms of deep

deeply, adverbdeepness, noun

Word Origin for deep

Old English dēop; related to Old High German tiof deep, Old Norse djupr

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Idioms and Phrases with deep

deep

In addition to the idioms beginning with deep

deep down
deep end
deep pocket
deep six
deep water

also see:

beauty is only skin deep
between a rock and a hard place (devil and deep blue sea)
go off the deep end
in deep
still waters run deep

deep

OTHER WORDS FOR deep

OPPOSITES FOR deep

Idioms about deep

Origin of deep

OTHER WORDS FROM deep

Words related to deep

How to use deep in a sentence

British Dictionary definitions for deep

Derived forms of deep

Word Origin for deep

Other Idioms and Phrases with deep