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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

Lee wrote on X they held "in-depth conversations about peace on the Korean Peninsula and Korea-US relations, and significant progress was made".

From Barron's • Jun. 18, 2026

In March, it was announced that she would give her first in-depth interview for a Disney+ documentary, speaking about the ordeal that led to her long absence from the music industry.

From BBC • Jun. 6, 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 dives into the candidates, their positions, fundraising and endorsement.

From Los Angeles Times • May 31, 2026

The truth is, after an in-depth investigation, I’ve determined his room spy-proof.

From "I'll Give You the Sun" by Jandy Nelson

Related Words

• comprehensive
• detailed
• exhaustive
• extensive
• thorough