Adjective

(er)

Extending far away from a point of reference, especially downwards.

#Extending far down from the top or surface; having its bottom far down.

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#*1591 , (William Shakespeare), Henry VI, Part 2 :

#*:Smooth runs the water where the brook is deep.

#Far in extent in another (non-downwards, but generally also non-upwards) direction away from a point of reference.

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#In a (specified) number of rows or layers.

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#Thick.

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#*, chapter=5

, title= The Mirror and the Lamp , passage=Here, in the transept and choir, where the service was being held, one was conscious every moment of an increasing brightness; colours glowing vividly beneath the circular chandeliers, and the rows of small lights on the choristers' desks flashed and sparkled in front of the boys' faces, deep linen collars, and red neckbands.}}

#Voluminous.

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#*

#*:Serene, smiling, enigmatic, she faced him with no fear whatever showing in her dark eyes.She put back a truant curl from her forehead where it had sought egress to the world, and looked him full in the face now, drawing a deep breath which caused the round of her bosom to lift the lace at her throat.

#A long way inside; situated far in or back.

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## Far from the center of the playing area, near to the boundary of the playing area, either in absolute terms or relative to a point of reference.

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## A long way forward.

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##(label) Relatively farther downfield.

Complex, involved.

#Profound, having great meaning or import, but possibly obscure or not obvious.

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#To a significant, not superficial, extent.

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#*2013 September 28, (Kenan Malik), " London Is Special, but Not That Special," New York Times (retrieved 28 September 2013):

#*:While Britain’s recession has been deep and unforgiving, in London it has been relatively shallow.

#Hard to penetrate or comprehend; profound; intricate; obscure.

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#* (Thomas De Quincey):

#*:Why it was that the ancients had no landscape painting, is a question deep almost as the mystery of life, and harder of solution than all the problems of jurisprudence combined.

#Of penetrating or far-reaching intellect; not superficial; thoroughly skilled; sagacious; cunning.

#*(rfdate), (William Shakespeare):

#*:deep clerks

Low in pitch.

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*{{quote-book, year=1922, author=(Ben Travers)

, chapter=5, title= A Cuckoo in the Nest , passage=The departure was not unduly prolonged.

(lb) Dark and highly saturated.

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, title=(The Celebrity), chapter=8 , passage=The day was cool and snappy for August, and the Rise all green with a lavish nature. Now we plunged into a deep shade with the boughs lacing each other overhead, and crossed dainty, rustic bridges over the cold trout-streams, the boards giving back the clatter of our horses' feet:

(lb) Sound, heavy (describing a state of sleep from which one is not easily awoken ).

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Immersed, submerged (in).

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Muddy; boggy; sandy; said of roads.

*(rfdate), :

*:The ways in that vale were very deep .

Adjective

(en adjective)

Necessary.

Very important; of high importance.

* {{quote-magazine, date=2013-05-17

, author=George Monbiot, authorlink=George Monbiot , title=Money just makes the rich suffer , volume=188, issue=23, page=19 , magazine=(The Guardian Weekly) citation , passage=In order to grant the rich these pleasures, the social contract is reconfigured. The welfare state is dismantled. Essential public services are cut so that the rich may pay less tax. […]}}

Being in the basic form; showing its essence.

Don’t mind him being grumpy. That’s the essential Fred.

Really existing; existent.

* Webster (1623)

Is it true, that thou art but a name, / And no essential thing?

Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.

(medicine) Idiopathic.