deep
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.
absorbing; engrossing: deep study.
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.
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.
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.
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.
Baseball. at or to a deep place or position: The outfielders played deep, knowing the batter's reputation as a slugger.
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
1Other words for deep
Opposites for deep
Other words from deep
- deep·ness, noun
- non·deep, adjective
- o·ver·deep, adjective
- un·deep, adjective
- un·deep·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use deep in a sentence
He said that the NYPD will be in deepest mourning this Christmas season.
“My deepest apologies for not writing sooner,” he began his letter to her by saying.
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 | THE DAILY BEASTI 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 | THE DAILY BEASTSend a postcard to PostSecret and your deepest thoughts could end up on a blog.
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 DickensAs 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. PikeThat is one of my deepest convictions, and I shall try very hard to prove that it is just.
God and my Neighbour | Robert BlatchfordThe 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. AbbottNo 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
/ (diːp) /
extending or situated relatively far down from a surface: a deep pool
extending or situated relatively far inwards, backwards, or sideways: a deep border of trees
cricket relatively far from the pitch: the deep field; deep third man
(postpositive) of a specified dimension downwards, inwards, or backwards: six feet deep
(in combination): a six-foot-deep trench
coming from or penetrating to a great depth: a deep breath
difficult to understand or penetrate; abstruse
learned or intellectually demanding: a deep discussion
of great intensity; extreme: deep 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; devious: a deep plot
mysterious or obscure: a deep secret
(of a colour) having an intense or dark hue
low in pitch or tone: a 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)
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 part: the deep of winter
a vast extent, as of space or time
nautical one of the intervals on a sounding lead, one fathom apart
far on in time; late: they worked deep into the night
profoundly or intensely
deep down informal in reality, esp as opposed to appearance: she is a very kind person deep down
deep in the past long ago
Origin of deep
1Derived forms of deep
- deeply, adverb
- deepness, noun
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
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
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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