deep

adjective
\ ˈdēp How to pronounce deep (audio) \

Definition of deep

 (Entry 1 of 3)

1 : extending far from some surface or area: such as
a : extending far downward a deep well a deep chasm
b(1) : extending well inward from an outer surface a deep gash a deep-chested animal
(2) : not located superficially within the body deep pressure receptors in muscles
c : extending well back from a surface accepted as front a deep closet
d : extending far laterally from the center deep borders of lace
e sports : occurring or located near the outer limits of the playing area hit to deep right field
f sports : thrown or hit for a considerable distance : thrown or hit deep (see deep entry 2 sense 3b) a deep pass a deep fly ball
2 : having a specified extension in an implied direction usually downward or backward a shelf 20 inches deep cars parked three-deep
3a : difficult to penetrate or comprehend : recondite deep mathematical problems deep discussions on the meaning of life
b : mysterious, obscure a deep dark secret
c : grave or lamentable in nature or effect in deepest disgrace
d : of penetrating intellect : wise a deep thinker
e : intensely engrossed or immersed she was deep in her book
f : characterized by profundity of feeling or quality a deep sleep also : deep-seated deep religious beliefs
4a of color : high in saturation and low in lightness a deep red
b : having a low musical pitch (see pitch entry 4 sense 4b) or pitch range a deep voice
5a : situated well within the boundaries a house deep in the woods
b : remote in time or space found deep in rural England
c : being below the level of consciousness deep neuroses
d : covered, enclosed, or filled to a specified degree usually used in combination ankle-deep in mud
6 : large deep discounts
7 : having many good players a deep bullpen
in deep water
: in difficulty or distress

deep

adverb

Definition of deep (Entry 2 of 3)

1 : to a great depth : deeply still waters run deep tunneled deep into the earth
2 : far on : late danced deep into the night

3 sports

a : near the outer limits of the playing area the shortstop was playing deep
b : long sense 6 threw deep to the wide receiver hit the ball deep to right field

deep

noun

Definition of deep (Entry 3 of 3)

1a : a vast or immeasurable extent : abyss
b(1) : the extent of surrounding space or time the azure deep
(2) nautical : ocean the briny deep
2 : any of the deep portions of a body of water specifically : a generally long and narrow area in the ocean where the depth exceeds 3000 fathoms (5500 meters) the Aldrich Deep in the south Pacific
3 : the middle or most intense part in the deep of winter
4 nautical : any of the fathom points on a sounding line other than the marks (see mark entry 1 sense 2b)

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Other Words from deep

Adjective

deeply adverb
deepness noun

Synonyms & Antonyms for deep

Synonyms: Adjective

abysmal, bottomless, profound

Synonyms: Noun

depth, height, middle, midst, thick

Antonyms: Adjective

shallow, shoal, skin-deep, superficial, surface

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Choose the Right Synonym for deep

Adjective

broad, wide, deep mean having horizontal extent. broad and wide apply to a surface measured or viewed from side to side. a broad avenue wide is more common when units of measurement are mentioned rugs eight feet wide or applied to unfilled space between limits. a wide doorway broad is preferred when full horizontal extent is considered. broad shoulders deep may indicate horizontal extent away from the observer or from a front or peripheral point. a deep cupboard deep woods

Examples of deep in a Sentence

Adjective

We walked in the deep snow. a deep valley between the mountains The water is deepest in the middle of the lake. She's afraid of swimming in deep water. a plant with deep roots The house has lots of deep closets. She has a small but deep wound on her arm. This enormous canyon is over a mile deep. The shelves are 10 inches deep. He stepped into an ankle-deep puddle of mud.

Adverb

The ship now lies deep below the water's surface. Our feet sank deeper into the mud. The treasure was buried deep within the ground. Their secret offices were located deep underground. We walked deep into the forest. The soldiers are operating deep within enemy territory. I stood three feet deep in the water. He stepped ankle-deep into a puddle of mud.

Noun

the kind of cold weather that we usually have only in the deep of winter sailors exploring the farther reaches of the briny deep
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Recent Examples on the Web: Adjective

Of those, only 368 are deeper than 900 feet — and Riverview owns 102 of them. Andrew Stern, NBC News, "Draining Arizona: Residents say corporate mega-farms are drying up their wells," 17 Sep. 2019 The problems are deep, the solutions are few, and stories like this one are all too common. Kelly Lawler, USA TODAY, "Review: Netflix's 'Unbelievable' is a harrowing true crime must-watch," 13 Sep. 2019 The Brewers are in the midst of playing 18 games without a day off, and the bullpen isn’t nearly as deep or talented as the ’18 group. Tom Haudricourt, Milwaukee Journal Sentinel, "Don't look now but Brewers manager Craig Counsell is 'bullpening' games again this September," 13 Sep. 2019 The situation got so desperate that in 2013 the Prestwick airport, deep in debt, was sold to the Scottish government for a little more than $1. David D. Kirkpatrick, New York Times, "Inside the Military’s 5-Star Layovers at a Trump Resort in Scotland," 12 Sep. 2019 But with Parscale’s help, Trump’s control over the committee has gone deeper. Peter Elkind, ProPublica, "The Myths of the “Genius” Behind Trump’s Reelection Campaign," 11 Sep. 2019 The deployment of blockers marks a tactical escalation by the deep-pocketed backers of HB6, signed by Gov. Mike DeWine in July. Andrew J. Tobias, cleveland.com, "Ohio nuclear bailout defenders deploy ground troops to thwart repeal effort’s signature collection," 10 Sep. 2019 The Assistant producer James Schamus (Brokeback Mountain) began shopping the script at Toronto last year and quickly assembled deep-pocketed investors to make the film. Tatiana Siegel, The Hollywood Reporter, "Toronto: The #MeToo Reckoning Comes to the Big Screen," 7 Sep. 2019 China is a deep-pocketed, rapacious regime that poses a significant threat not just to American interests but to the entire civilized world. Chen Guangcheng, Twin Cities, "Chen Guangcheng: Trump has the right strategy on Beijing. As a Chinese dissident, I’d know.," 5 Sep. 2019

Recent Examples on the Web: Adverb

That’s the upshot from this weekend’s drone attack on Abqaiq, the largest oil processing facility on the planet, located deep in the heart of Saudi Arabia’s energy industry. Bernhard Warner, Fortune, "Peak Oil Uncertainty: Crude’s Record-setting Jump Roils Global Markets—and the Worst May Be Yet to Come," 16 Sep. 2019 Eventually, all of the plastic contamination ends up in the same place—documented deep in the mud. Carolyn Kormann, The New Yorker, "Where Does All the Plastic Go?," 16 Sep. 2019 The Porter defense forced a fourth down punt on the Broncos next possession, but the Bronco punt pinned them deep in their own territory. David Taylor, Houston Chronicle, "Error-prone Broncos fall to Porter, 19-7," 16 Sep. 2019 This nondescript 46,000-square-foot facility, deep in a Clackamas County industrial park, is WaveCel’s new home. oregonlive, "WaveCel bursts onto the bike scene, expands into Wilsonville facility," 16 Sep. 2019 Franko, a senior from Clarendon Hills, blocked a punt in the second quarter, giving the Red Devils (3-0) the ball deep in Hornets’ territory. Patrick Kelly, chicagotribune.com, "Nick Franko’s big plays help Hinsdale Central top rival Hinsdale South," 14 Sep. 2019 Whichever opponent handles the ball most will find Richardson embedded deep in their personal space. Rob Mahoney, SI.com, "Top 100 NBA Players of 2020," 12 Sep. 2019 In June, in a lush valley at 4000 meters—more than two vertical kilometers below Chimborazo's summit—geographer Jeff La Frenierre stood waist deep in a concrete irrigation channel flowing with turbid water. Tim Appenzeller, Science | AAAS, "Global warming has made iconic Andean peak unrecognizable," 11 Sep. 2019 Avoiding two near-safeties, the Fighting Irish punted deep in their own end zone. Alexander Harrison, Cincinnati.com, "Cincinnati, Ohio, high school football: Elder survives OT against Indianapolis Cathedral," 7 Sep. 2019

Recent Examples on the Web: Noun

In many spots along the sidewalk, spectators stood zero deep. Steve Rubenstein, SFChronicle.com, "Filipinos celebrate annual Pistahan festival in SF," 10 Aug. 2019 Alexandra and Yongden decided to walk knee-deep into the tableland ahead of them. Ailsa Ross, Longreads, "Mountains, Transcending," 9 Aug. 2019 The Pirates are switching from a 3-4 defense to a 4-3, and the team’s strength, Gonzalez says, are a deep and experienced linebacker corps, featuring returning starters Crisp, Zeke Alleman, and Chris Castillo. Scott French, Daily Pilot, "Junior College Football Preview: Orange Coast looks to turn things around," 6 Sep. 2019 Key Play: Nebraska’s JD Spielman fumbled a punt deep in his own territory to set up South Alabama’s first touchdown, which cut a 21-point lead to 14. Creg Stephenson | Cstephenson@al.com, al, "Quarter-by-quarter look at South Alabama’s 35-21 loss to Nebraska," 31 Aug. 2019 The antihero of the Ultimate Fighting Championship was on his patio, neck-deep in training for his first fight in three years. John Branch, New York Times, "U.F.C. Needs an Antihero: Nate Diaz Returns Just in Time," 15 Aug. 2019 The Jaguars’ deep and experienced defensive front — which features five seniors and a fourth-year junior — also had a nice day, particularly after star Tyree Turner left the game due to injury in the first quarter and did not return. Creg Stephenson | Cstephenson@al.com, al, "5 things we learned from South Alabama’s 35-21 loss to Nebraska," 2 Sep. 2019 Following a recent practice, fans lined up four-deep behind a rope, a tangled knot of outstretched arms waving balls, hats and helmets. Rick Maese, The Denver Post, "With Vegas move on horizon, Raiders fans are torn between staying loyal and moving on," 19 Aug. 2019 Junior Justin McCoy is back at running back and the Sailors also have a deep and experienced receiving corps led by Goltz, who had 66 catches for 883 yards and three touchdowns last season. Matt Szabo, Daily Pilot, "High School Football Preview: Newport Harbor vies for more Sunset League relevance," 15 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deep.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of deep

Adjective

before the 12th century, in the meaning defined at sense 1

Adverb

before the 12th century, in the meaning defined at sense 1

Noun

before the 12th century, in the meaning defined at sense 1a

History and Etymology for deep

Adjective, Adverb, and Noun

Middle English dep, from Old English dēop; akin to Old High German tiof deep, Old English dyppan to dip — more at dip

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Statistics for deep

Last Updated

3 Oct 2019

Look-up Popularity

Time Traveler for deep

The first known use of deep was before the 12th century

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More Definitions for deep

deep

adjective

English Language Learners Definition of deep

 (Entry 1 of 2)

: having a large distance to the bottom from the surface or highest point
: going far inward from the outside or the front edge of something
: located far inside something

deep

adverb

English Language Learners Definition of deep (Entry 2 of 2)

: far into or below the surface of something
: far into or inside something
: at a specified measurement downward, inward, or backward

deep

adjective
\ ˈdēp How to pronounce deep (audio) \
deeper; deepest

Kids Definition of deep

 (Entry 1 of 3)

1 : reaching far down below the surface
2 : reaching far inward or back from the front or outer part a deep cut a deep closet
3 : located well below the surface or well within the boundaries of deep in the ground
4 : coming from well within a deep sigh
5 : completely absorbed deep in thought
6 : hard to understand This story is too deep for me.
7 : mysterious a deep, dark secret
8 : extreme in degree : heavy a deep sleep
9 : dark and rich in color a deep red
10 : low in tone a deep voice

Other Words from deep

deeply adverb

deep

adverb
deeper; deepest

Kids Definition of deep (Entry 2 of 3)

1 : to a great depth : deeply
2 : late entry 2 sense 1 She read deep into the night.

deep

noun

Kids Definition of deep (Entry 3 of 3)

1 : a very deep place or part the ocean deeps
2 : ocean sense 1 Pirates sailed the briny deep.
3 : the middle or most intense part the deep of winter

deep

adjective
\ ˈdēp How to pronounce deep (audio) \

Medical Definition of deep

1a : extending well inward from an outer surface a deep gash
b(1) : not located superficially within the body or one of its parts deep pressure receptors in muscles
(2) : resulting from or involving stimulation of deep structures deep pain deep reflexes
2 : being below the level of the conscious deep neuroses

Other Words from deep

deeply adverb

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More from Merriam-Webster on deep

Thesaurus: All synonyms and antonyms for deep

Spanish Central: Translation of deep

Nglish: Translation of deep for Spanish Speakers

Britannica English: Translation of deep for Arabic Speakers

Comments on deep

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