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• in-depth
  in-depth

  adjective

  extensive, thorough, or profound.
• in depth
  in depth

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

in-depth

American  

[in-depth] / ˈɪnˈdɛpθ /

adjective

1. extensive, thorough, or profound.

   an in-depth analysis of the problem.

2. well-balanced or fully developed.

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in-depth British  

adjective

1. carefully worked out, detailed and thorough

   an in-depth study

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in depth Idioms  

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

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Etymology

Origin of in-depth

First recorded in 1960–65

Example Sentences

See Examples For:

in-depth in depth

In this Money Talks: Felix Salmon sits down with Lee Buchheit for an in-depth chat on sovereign debt at a live event hosted by The Library of Mistakes.

From Slate ● Aug. 4, 2026

Lord Mandelson was announced as the UK's ambassador to the US in December 2024, before in-depth vetting had been carried out, and formally took up the role in February 2025 after being granted security clearance.

From BBC ● Jul. 13, 2026

Published in May, the Johns Hopkins Agora Institute and ReD Associates conducted an in-depth research of conservatives in three red counties in Michigan, South Carolina and Wyoming.

From Salon ● Jul. 5, 2026

It’s an in-depth portrait of Mr. Netravalkar—including his successes in youth cricket back in Mumbai, his education at Cornell, his marriage and family, and his integration into Oracle.

From The Wall Street Journal ● Jun. 16, 2026

In the days leading up to the charrette, Durham’s two white newspapers also featured several in-depth stories about the event, many of them focusing on the odd couple chairing it.

From "The Best of Enemies" by Osha Gray Davidson

The discovery of Masripithecus moghraensis suggests that important parts of ape evolutionary history may remain buried in regions that paleontologists have not yet explored in depth.

From Science Daily ● Jul. 24, 2026

Instead, it delivered a watered-down facsimile of those sounds, that critics called "unremarkable", "obtuse" and "lacking in depth".

From BBC ● Jun. 13, 2026

But he also explores, in depth, the complexities of the band’s central figure, Maurice White.

From Los Angeles Times ● Jun. 9, 2026

While the Ozu landmarks—“Late Spring,” “Early Summer,” “An Autumn Afternoon”—are examined in depth, so are such ’30s and ’40s efforts as “A Story of Floating Weeds” and “There Was a Father.”

From The Wall Street Journal ● Apr. 30, 2026

When Elizebeth and her team solved Enigma in depth, what exactly were they doing?

From "The Woman All Spies Fear" by Amy Butler Greenfield

Related Words

• comprehensive
• detailed
• exhaustive
• extensive
• thorough