index librorum prohibitorum
C1/C2 (Very Low Frequency)Formal, Academic, Historical
Definition
Meaning
An official list of books prohibited by the Catholic Church as heretical or immoral, publication of which was forbidden for members.
By extension, any authoritative list of banned or censored publications, or a symbolic representation of institutional censorship.
Linguistics
Semantic Notes
Always capitalized as a proper noun. Used almost exclusively in historical, religious, or literary contexts to refer to the specific Catholic list (1569-1966) or metaphorically for severe censorship. Not used in contemporary law or general publishing.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The term is equally rare in both varieties.
Connotations
Carries strong historical and negative connotations of religious censorship, suppression of ideas, and the conflict between authority and intellectual freedom.
Frequency
Extremely low frequency in both regions, confined to specialized historical or theological discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
be + placed/listed/entered + on the Index Librorum Prohibitorumthe Index Librorum Prohibitorum + verb (banned, prohibited, listed)reference to + the Index Librorum ProhibitorumVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[to be] a one-man Index Librorum Prohibitorum (humorous/metaphorical for someone who censors aggressively)”
Usage
Context Usage
Business
Virtually never used.
Academic
Used in history, religious studies, and literature papers discussing Catholic history, censorship, or the Enlightenment.
Everyday
Not used. Unfamiliar to most general speakers.
Technical
Used as a precise historical term in theology and historiography.
Examples
By Part of Speech
verb
British English
- The work was indexed by the Vatican.
- The Vatican indexed numerous philosophical texts.
American English
- The Church indexed the controversial publication.
- They indexed books considered dangerous to faith.
adverb
British English
- The book was treated Index-style, with immediate suppression.
- It was banned, quite Index-like, without public debate.
American English
- The committee acted Index-fashion, banning the text outright.
- It was censored, rather Index-ishly, for moral reasons.
adjective
British English
- The Index-related decrees were strictly enforced.
- He studied the Index prohibitions in depth.
American English
- An Index-listed book was hard to obtain.
- The Index decision caused great controversy.
Examples
By CEFR Level
- The 'Index Librorum Prohibitorum' is a historical list from the Catholic Church.
- Many famous books were on this list.
- Galileo's writings were placed on the Index Librorum Prohibitorum, preventing Catholics from reading them.
- The abolition of the Index in 1966 marked a significant shift in Church policy.
- Scholars argue that the Index Librorum Prohibitorum not only suppressed heretical ideas but also inadvertently fueled intellectual curiosity about forbidden knowledge.
- The metaphor of a modern 'Index' is often invoked in debates about cancel culture and the de-platforming of authors.
Learning
Memory Aids
Mnemonic
Think of a librarian with a big red 'X' (Index) saying 'Liberty? No rum here! Prohibit 'em!' (Librorum Prohibitorum) to remember the banning of books.
Conceptual Metaphor
CENSORSHIP IS A LIST; SUPPRESSION OF IDEAS IS BANISHMENT TO AN INDEX.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'Index' as 'указатель' (pointer/guide). It is a specific list/catalogue. The full Latin phrase is a proper noun and is often not translated, but explained as 'Индекс запрещённых книг'.
Common Mistakes
- Mispronouncing 'Librorum' (stress on 'bro') or 'Prohibitorum'. Using it as a common noun (e.g., 'an index librorum prohibitorum'). Incorrect pluralisation (*Indexes Librorum Prohibitorum).
Practice
Quiz
What was the primary purpose of the Index Librorum Prohibitorum?
FAQ
Frequently Asked Questions
No, the official list was abolished by the Catholic Church in 1966. However, the Church still maintains guidelines on writings considered harmful to faith and morals, but not in the form of a published Index.
Yes, but only metaphorically. For example, 'The school board's banned book list is like a secular Index Librorum Prohibitorum.' It is not used for official contemporary censorship lists.
Because it was an official document of the Roman Catholic Church, which used Latin as its primary administrative and liturgical language for centuries. The name translates to 'Index of Prohibited Books'.
No. The Index included a wide range of works, including scientific texts (like Galileo's), philosophical treatises (by Descartes, Kant), and literary works (by authors like Diderot and Sartre), deemed to conflict with Church teaching or morality.