Definition of "tome"

And Sam presents Tyrion with A Song Of Ice And Fire, a tome in which Tyrion’s own role, far from that of the clever hero or Machiavellian snake, doesn’t even exist.

2019 May 19, Alex McLevy, “The final Game Of Thrones brings a pensive but simple meditation about stories (newbies)”, in The A.V. Club‎

One senses, picking up Twenge’s tome — 515 pages before you get to the appendix — an attempt to quell past criticisms. “I see this book as my magnum opus,” she said.

2023 April 20, Casey Schwartz, “Jean Twenge is ready to make you defend your generation again”, in The Washington Post‎