abridgmentEnglishOxford American Thesaurusabridgment noun an abridgment of a book: summary, abstract, synopsis, precis, outline, résumé, sketch, truncation, digest, recapitulation, recap, summing-up, rundown, roundup, review, shortening, shortened version, abridged version, concise version, condensation; rare conspectus. ▷antonyms expansion.