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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

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

Assisted by AI, they could access the latest research to support accurate diagnosis and identify options that inform an in-depth conversation as they decide on the best treatment.

From MarketWatch ● Jun. 27, 2026

Afterwards, he thanked Kim in a letter, saying the leaders had "made an in-depth exchange of views on the issues of mutual interest and achieved a series of important common understanding", according to KCNA.

From Barron's ● Jun. 10, 2026

To break them, she and her team looked at the messages in-depth.

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

“There was a columnist … who documented in depth the situation at MacArthur Park,” Bob wrote in reference to me.

From Los Angeles Times ● Jun. 6, 2026

Researchers then used artificial intelligence to examine the speech recordings in depth.

From Science Daily ● May 13, 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

Whether its ChatGPT, Claude, or even Google’s AI Overviews, there are more options than ever for people to get quick, in depth answers to their everyday questions.

From Barron's ● Apr. 30, 2026

That made solving in depth a challenge, but top code breakers figured out other ways of aligning messages with statistics and other insights.

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

Related Words

• comprehensive
• detailed
• exhaustive
• extensive
• thorough