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in-depth

[in-depth]
SEE MORE SYNONYMS FOR in-depth ON THESAURUS.COM

adjective

extensive, thorough, or profound: an in-depth analysis of the problem.
well-balanced or fully developed.

Origin of in-depth

First recorded in 1960–65

depth

[depth]

noun

a dimension taken through an object or body of material, usually downward from an upper surface, horizontally inward from an outer surface, or from top to bottom of something regarded as one of several layers.
the quality of being deep; deepness.
complexity or obscurity, as of a subject: a question of great depth.
gravity; seriousness.
emotional profundity: the depth of someone's feelings.
intensity, as of silence, color, etc.
lowness of tonal pitch: the depth of a voice.
the amount of knowledge, intelligence, wisdom, insight, feeling, etc., present in a person's mind or evident either in some product of the mind, as a learned paper, argument, work of art, etc., or in the person's behavior.
a high degree of such knowledge, insight, etc.
Often depths. a deep part or place: from the depths of the ocean.
an unfathomable space; abyss: the depth of time.
Sometimes depths. the farthest, innermost, or extreme part or state: the depth of space; the depths of the forest; the depths of despair.
Usually depths. a low intellectual or moral condition: How could he sink to such depths?
the part of greatest intensity, as of night or winter.
Sports. the strength of a team in terms of the number and quality of its substitute players: With no depth in the infield, an injury to any of the regulars would be costly.

Origin of depth

1350–1400; Middle English depthe, equivalent to dep (Old English dēop deep) + -the -th1
Related formsdepth·less, adjective

Antonyms for depth

2. shallowness. 9. superficiality.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for in depth

comprehensive, in-depth, demanding, thorough, all-out, detailed, penetrating, confidential, profound, firsthand, visceral, exhaustive, extensive, full, complete, broad, global, overall, far-reaching, all-inclusive
British Dictionary definitions for in depth

depth

noun

the extent, measurement, or distance downwards, backwards, or inwards
the quality of being deep; deepness
intensity or profundity of emotion or feeling
profundity of moral character; penetration; sagacity; integrity
complexity or abstruseness, as of thought or objects of thought
intensity, as of silence, colour, etc
lowness of pitch
nautical the distance from the top of a ship's keel to the top of a particular deck
(often plural) a deep, far, inner, or remote part, such as an inaccessible region of a country
(often plural) the deepest, most intense, or most severe partthe depths of winter
(usually plural) a low moral state; demoralizationhow could you sink to such depths?
(often plural) a vast space or abyss
beyond one's depth or out of one's depth
  1. in water deeper than one is tall
  2. beyond the range of one's competence or understanding
in depth thoroughly or comprehensivelySee also in-depth

Word Origin for depth

C14: from dep deep + -th 1

in-depth

adjective

carefully worked out, detailed and thoroughan in-depth study
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for in depth

depth

n.

late 14c., apparently formed in Middle English on model of length, breadth; from Old English deop "deep" (see deep) + -th (2). Replaced older deopnes "deepness." Though the English word is relatively recent, the formation is in Proto-Germanic, *deupitho-, and corresponds to Old Saxon diupitha, Dutch diepte, Old Norse dypð, Gothic diupiþa.

Online Etymology Dictionary, © 2010 Douglas Harper
in depth in Medicine

depth

[dĕpth]

n.

The extent, measurement, or dimension downward, backward, or inward.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Idioms and Phrases with in depth

in depth

Profoundly, thoroughly, as in It will take years to cover the entire subject in depth. [Mid-1900s]

depth

see in depth; out of one's depth.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.