deep down

Also found in: Thesaurus, Medical, Idioms, Encyclopedia, Wikipedia.


adj. deep·er, deep·est
a. Extending far downward below a surface: a deep hole in the river ice.
b. Extending far inward from an outer surface: a deep cut.
c. Extending far backward from front to rear: a deep walk-in refrigerator.
d. Extending far from side to side from a center: a deep yard surrounding the house.
e. Far distant down or in: deep in the woods.
f. Coming from or penetrating to a depth: a deep sigh.
g. Sports Located or taking place near the outer boundaries of the area of play: deep left field.
2. Extending a specific distance in a given direction: snow four feet deep.
3. Far distant in time or space: deep in the past.
a. Difficult to penetrate or understand; recondite: a deep metaphysical theory.
b. Of a mysterious or obscure nature: a deep secret; ancient and deep tribal rites.
c. Very learned or intellectual; wise: a deep philosopher.
d. Exhibiting great cunning or craft: deep political machinations.
a. Of a grave or extreme nature: deep trouble; deepest deceit.
b. Very absorbed or involved: deep in thought; deep in financial difficulties.
c. Profound in quality or feeling: a deep trance; deep devotion.
6. Rich and intense in shade. Used of a color: a deep red.
7. Low in pitch; resonant: a deep voice.
8. Covered or surrounded to a designated degree. Often used in combination: waist-deep in the water; ankle-deep in snow.
9. Large in quantity or size; big: deep cuts in the budget.
10. Sports Having a sufficient number of capable reserve players: That team is not very deep.
1. To a great depth; deeply: dig deep; feelings that run deep.
2. Well along in time; late: worked deep into the night.
3. Sports Close to the outer boundaries of the area of play: played deep for the first three innings; ran deep into their opponents' territory.
1. often deeps
a. A deep place in land or in a body of water: drowned in the deep of the river.
b. A vast, immeasurable extent: the deep of outer space.
2. The extent of encompassing time or space; firmament.
3. The most intense or extreme part: the deep of night.
4. The ocean.
5. Nautical A sounding that falls between marks on a lead line and thus corresponds to an estimated depth rather than a precise depth.
deep down
At bottom; basically: Deep down, she was still a rebel.
in deep water
In difficulty.

[Middle English dep, from Old English dēop; see dheub- in Indo-European roots.]

deep′ly adv.
deep′ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.deep down - in reality; "she is very kind at heart"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
But he drilled deep down, and blasted all my reason out of me!
Let faith oust fact; let fancy oust memory; I look deep down and do believe.
I evolved this sage reflection, as, lost deep down in the green alleys of the dingle, having fortified the romantic side of my nature with sandwiches and sherry, I lazily put the question to myself as to what manner of girl I expected the Golden Girl to be.
Such as few men can claim: Deep down below a prison-yard,
Deep down in each of them there was a kind of hearty joviality, a relish of life, not over-delicate, but very invigorating.
"I didn't know it before, Hilda, on my honor I didn't, but I believe it was because, deep down in me somewhere, I was hoping I might drive you to do just this.
He told himself that deep down in his heart was mortified pride; his passion had begun in wounded vanity, and it was this at bottom which caused now a great part of his wretchedness.
Smoke arose from a thousand holes in the snow, where, deep down on bed-rock, in the frozen muck and gravel, men crept and scratched and dug, and ever built more fires to break the grip of the frost.
For many thousands of generations he had been away from it; yet, deep down in the crypts of being, tied about and wrapped up in every muscle and nerve of him, was the indelible record of the days in the wild when dim ancestors had run with the pack and at the same time developed the pack and themselves.
Deep down in his sunless soul he was either a prince, a fool or an artist.
He had always determined, deep down in his resolute heart, that nothing would ever induce him to allow his daughter to wed a Mormon.
Back and deep down on the tie-ribs of consciousness, in the mind, say, of the English-speaking race, was a capacity to thrill to short, Saxon words; back and deep down on the tie-ribs of consciousness of the Chinese mind was a capacity to thrill to its own hieroglyphics; but the Chinese mind could not thrill to short, Saxon words; nor could the English-speaking mind thrill to hieroglyphics.