Wiktionary
a. comprehensive, thorough, detailed. alt. comprehensive, thorough, detailed.
WordNet
adj. having a specified depth; "six feet in depth (or deep)" [syn: in depth(p)]
Wikipedia
In Depth is a three-hour program that airs monthly on C-SPAN 2 as part of their Book TV programming, and features a different writer each month. Each interview covers the breadth of that author's writing career, and incorporates viewer calls and e-mails. The show is typically broadcast live the first Sunday of each month. The first program was on February 6, 2000, and was a discussion with historian John Lukacs. For the first several years of the show, episodes were not produced during the summer months.
There have been a few exceptions to the practice of featuring one single author, as with the programs featuring the Strand Bookstore, Frank Williams and Edna Greene Medford's discussion of writings on Lincoln, and John K. Wilson and Jonathan Karp's discussions of the writings of Barack Obama and John McCain.
Sometimes, the profile will include taped footage of the author's own home or office, so as to give further perspective on how they approach the task of writing. On occasion (as with the programs with Shelby Foote and Harold Bloom) entire three-hour interviews have been conducted live at the home or office of the featured author.
Usage examples of "in depth".
She knew well enough what was being said for she and Tina had discussed it in depth the evening before.