know like a book

verb

To have an extensive and penetrating understanding of (something or someone).

Meanings

verbknow like a book (third-person singular simple present knows like a book, present participle knowing like a book, simple past knew like a book, past participle known like a book)

present singular third person knows like a book · participle present knowing like a book · past knew like a book · participle past known like a book

  1. transitivesimileTo have an extensive and penetrating understanding of (something or someone).

    "Around here I know the shoreline like a book."

    2010, Bill Ratcliffe, Liz, →ISBN, page 24
    3 more examples

    "He's a bad man, that John Mason, and my advice to you and to every one, is to keep clear of him. I know him like a book."

    1851, T. S. Arthur, “That John Mason”, in Off-Hand Sketches

    "Olson can hide out around here until the snow flies if he wants to. He knows these woods—every steam and lake—like a book."

    1939 June 21, “Slayer Still Free in Woods”, in Leader Post, Saskatchewan, Canada, retrieved 18 Nov 2013, page 9

    "I played with the guy seven days a week; I knew him like a book."

    1998 March 22, Dave Anderson, “College Basketball: When Sherman White Threw It All Away”, in New York Times, retrieved 18 Nov 2013

    Synonyms: know inside and out, know like the back of one's hand

Synonyms & antonyms

verbTo have an extensive and penetrating understanding of (something or someone).

Cite this entry
APA

know like a book. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/know%20like%20a%20book

MLA

“know like a book.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/know%20like%20a%20book. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “know like a book,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/know%20like%20a%20book.

Source: know like a book on Wiktionary, CC BY-SA 4.0.