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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

Siri AI functions similarly to other AI chatbots by providing in-depth answers to user questions.

From Barron's • Jun. 9, 2026

"Roman won't analyze atmospheres in the same in-depth way as missions like NASA's James Webb Space Telescope, but it will gather different information on a much larger scale," Wilson said.

From Science Daily • Jun. 1, 2026

JD.com said that it viewed the in-depth probe as a normal procedural step in the commission’s review.

From The Wall Street Journal • May 28, 2026

In his essay of more than 5,600 words - his first in-depth critique of Sir Keir's government - Sir Tony argued the "principal problem" was not "Keir's personality" or "a failure to communicate 'our achievements'".

From BBC • May 28, 2026

An awkwardness had sprung up after those few months, where before there would have been playful laughter and in-depth conversation and harmless bickering between us.

From "Where Things Come Back" by John Corey Whaley

Related Words

• comprehensive
• detailed
• exhaustive
• extensive
• thorough