Deep Definition

dēp
deeper, deepest, deeps
adjective
deeper, deepest
Extending far downward below a surface.
A deep hole in the river ice.
American Heritage
Extending far downward from the top or top edges, inward from the surface, or backward from the front.
A deep cut, a deep lake, a deep drawer.
Webster's New World
Extending far inward from an outer surface.
A deep cut.
American Heritage
Located far down or back.
Deep in the outfield.
Webster's New World
Extending far from side to side from a center.
A deep yard surrounding the house.
American Heritage
adverb
In a deep way or to a deep extent; far down, far in, far back, etc.
To dig deep.
Webster's New World
To a great depth; deeply.
Dig deep; feelings that run deep.
American Heritage
Well along in time; late.
Worked deep into the night.
American Heritage
Close to the outer boundaries of the area of play.
Played deep for the first three innings; ran deep into their opponents' territory.
American Heritage
Synonyms:
noun
deeps
A deep place or any of the deepest parts, as in water or earth.
Webster's New World
A vast, immeasurable extent.
The deep of outer space.
American Heritage
The extent of encompassing space or time, of the unknown, etc.
Webster's New World
The middle part; part that is darkest, most silent, etc.
In the deep of night.
Webster's New World
Any of the unmarked fathom points between those marked on a lead line.
Webster's New World
idiom
deep down
  • At bottom; basically:

    Deep down, she was still a rebel.

American Heritage
in deep water
  • In difficulty.
American Heritage
go off the deep end
  • to behave in a rash or reckless manner
  • to go insane
Webster's New World
in deep water
  • in trouble or difficulty
Webster's New World
the deep
  • the sea or ocean
Webster's New World

Other Word Forms of Deep

Noun

Singular:
deep
Plural:
deeps

Adjective

Base Form:
deep
Comparative:
deeper
Superlative:
deepest

Idioms, Phrasal Verbs Related to Deep

  • deep down
  • in deep water
  • go off the deep end
  • in deep water
  • the deep

Origin of Deep

  • From Middle English depe, from Old English dēop (“deep, profound; awful, mysterious; heinous; serious, solemn, earnest; extreme, great”), from Proto-Germanic *deupaz (“deep”), from Proto-Indo-European *dʰéwbus, from *dʰewb- (“deep”). Cognate with Scots depe (“deep”), Eastern Frisian djap (“deep”), West Frisian djip (“deep”), Low German deep (“deep”), Dutch diep (“deep”), German tief (“deep”), Danish dyb (“deep”), Norwegian dyp (“deep”), Swedish djup (“deep”), Icelandic djúpur (“deep”), Lithuanian dubùs (“deep, hollow”), Albanian det (“sea”), Welsh dwfn (“deep”).

    From Wiktionary

  • Middle English dep from Old English dēop dheub- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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