Definition of deep
1 : extending far from some surface or area: such asa : extending far downward a deep well a deep chasmb (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 musclesc : extending well back from a surface accepted as front a deep closetd : extending far laterally from the center deep borders of lacee sports : occurring or located near the outer limits of the playing area hit to deep right fieldf sports : thrown or hit for a considerable distance : thrown or hit deep (see 2deep 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 lifeb : mysterious, obscure a deep dark secretc : grave or lamentable in nature or effect in deepest disgraced : of penetrating intellect : wise a deep thinkere : intensely engrossed or immersed she was deep in her bookf : 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 redb : having a low musical pitch (see 4pitch 4b) or pitch range a deep voice
5a : situated well within the boundaries a house deep in the woodsb : remote in time or space found deep in rural Englandc : being below the level of consciousness deep neurosesd : 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 bull pen
deeply
adverbdeepness
nounin deep water
: in difficulty or distress
From the M-W Editors
Examples of deep in a Sentence
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.
Origin and Etymology of deep
Middle English dep, from Old English dēop; akin to Old High German tiof deep, Old English dyppan to dip — more at dip
First Known Use: before 12th century
Synonym Discussion of deep
Other Anatomy Terms
deep
Definition of deep
Examples of deep in a Sentence
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.
Origin and Etymology of deep
see 1deep
First Known Use: before 12th century
deep
Definition of deep
1a : a vast or immeasurable extent : abyssb (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 1mark 2b)
Examples of deep in a Sentence
the kind of cold weather that we usually have only in the deep of winter
sailors exploring the farther reaches of the briny deep
Origin and Etymology of deep
see 1deep
First Known Use: before 12th century
DEEP Defined for English Language Learners
Definition of deep for English Language Learners
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: having a large distance to the bottom from the surface or highest point
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: going far inward from the outside or the front edge of something
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: located far inside something
deep
Definition of deep for English Language Learners
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: far into or below the surface of something
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: far into or inside something
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: at a specified measurement downward, inward, or backward
DEEP Defined for Kids
Definition of deep for Students
deeper
;deepest
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
deeply
adverbMedical Dictionary
deep
playMedical Definition of deep
1a: extending well inward from an outer surface a deep gashb (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
deeply
adverbLearn More about deep
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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
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