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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

Our in-depth voter guide gives you a deep dive into the candidate positions, fundraising and other coverage.

From Los Angeles Times • May 31, 2026

The European Union opened an in-depth foreign subsidies probe into JD.com’s planned $2.6 billion takeover of German retailer Ceconomy.

From The Wall Street Journal • May 28, 2026

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

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

Related Words

• comprehensive
• detailed
• exhaustive
• extensive
• thorough