Phrase guide

in one's book

prep_phrase · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

prep_phrase

Meaning 1

In one's opinion.

Definition source: English Wiktionary via Wiktextract

Usage: informal

Examples

  • Near-synonyms: in one's view, in one's eyes, to one's mind; see also Thesaurus:in my opinion
  • Clara did nothing wrong in my book.
  • In my book, there's nothing wrong with that.
  • In his book, that counts as an affront, for some reason.

Meaning relationships

Synonyms: in someone's view, in someone's eyes, to one's mind

Antonyms: none provided

2

prep_phrase

Meaning 2

Used other than figuratively or idiomatically: see in, one's, book.

Definition source: English Wiktionary via Wiktextract

Examples

  • Today's homework is in your book. Could I borrow it?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Refers to a notional book or list of one's opinions and beliefs. Slang from the mid-1900s.