English Reference
noun

tome

n.
US /ˈtoʊm/ UK /tˈəʊm/ tome UK spelling tomes

  1. 01 C2 Proficiency FormalLiterary

    a very large, thick, or heavy book, usually one that is serious or academic.

    a large, heavy, or scholarly book. Often used to imply the work is physically imposing or intellectually dense.

    Simple

    He pulled a dusty, leather-bound tome from the top shelf of the library.

    In context

    The professor spent decades compiling his research into a massive tome that few students had the stamina to read in its entirety.

    Usage

    Usually used as a countable noun.

    Teacher's tip

    This word is often used with a touch of irony to describe a book that is unnecessarily long or difficult to carry.

  2. 02 C2 Proficiency ArchaicTechnical

    one specific book in a series of several related books.

    one volume of a larger work consisting of several volumes. This sense reflects the word's etymological roots meaning 'a cutting' or 'section'.

    Simple

    The first tome of the encyclopedia covers everything from A to C.

    In context

    The historian consulted the third tome of the series to verify the dates of the late medieval treaties.

    Usage

    In modern English, 'volume' is almost always preferred for this meaning.

What if the challenging complexity and political engagement of his tomes are exactly what’s needed?

The Conversation· 24 Aug 2026

Secondhand booksellers in the UK and Ireland are reporting a flurry of bulk orders from mystery buyers, amid speculation AI companies are acquiring the tomes for their data.

The Guardian· 15 Aug 2026

From Middle French tome, from Latin tomus (“section of larger work”), from Ancient Greek τόμος (tómos, “section, roll of papyrus, volume”), from τέμνω (témnō, “I cut, separate”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Ancient Greek τόμος
Level C2 · Proficiency
Frequency Frequent
Updated