- The definition of in depth is doing something fully, carefully or with great attention to detail.
An example of an in depth look at an issue is when you research every possible argument or side to that issue.
in-depth definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
carefully worked out, detailed, profound, thorough, etc.: an in-depth study
in-depth definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Detailed; thorough: an in-depth study.
in-depth - Phrases/Idioms
Profoundly, thoroughly, as in It will take years to cover the entire subject in depth. [Mid-1900s]