English Reference
adjective

notorious

adj.
US /noʊˈtɔɹiəs/ UK /nəʊtˈɔːɹɪəs/ no·to·ri·ous

  1. 01 B2 Upper Intermediate

    famous or well-known for something bad or negative.

    widely known and commonly spoken of, specifically for an unfavourable or undesirable reason.

    Simple

    The city is notorious for its terrible traffic during the summer months.

    In context

    The region became notorious for its unpredictable weather, which frequently disrupted the local agricultural cycle and caused significant economic losses.

    Usage

    Often followed by the preposition 'for' or 'as'.

    Pitfall
    He is notorious for his good cooking. He is famous for his good cooking.

    Notorious is only used for negative things. Use 'famous' or 'well-known' for positive things.

    infamousill famed
  2. 02 C1 Advanced Formal

    clearly known by everyone; impossible to hide.

    widely acknowledged or evident; used when a fact is common knowledge, often with a neutral or slightly formal tone.

    Simple

    It is notorious that the two companies have been rivals for decades.

    In context

    The inefficiency of the old postal system was notorious among the local merchants, who often resorted to private couriers for urgent deliveries.

    Usage

    Usually used as a predicative adjective after a linking verb.

Thus was sparked an international murder case, one of the most notorious in Britain, later called “the crime of the century”, of which Hallie Rubenhold gives an engrossing account.

The Guardian· 16 Jul 2026

It turns out the previous owner was a devotee of chaos magic, inspired by the notorious Aleister Crowley, who died in a Hastings boarding house called Netherwood.

The Guardian· 7 Aug 2026

From Late Middle English notoryous, from Medieval Latin nōtōrius (“evident, known; famous, well-known; infamous”), from Latin nōtus (“known, recognized; familiar, widely known; famous, well-known; infamous”) + -tōrius (suffix forming adjectives). Nōtus is the perfect passive participle of nōscō (“to become acquainted with or learn about (something); (rare) to be familiar with, recognize”), ultimately from Proto-Indo-European *ǵneh₃- (“to know; to recognize”). cognates * Catalan notori (“well-known”) * Middle French notoire (Anglo-Norman notoire, notoir, notore, notorie, modern French notoire (“notorious; well-known”)) * Italian notorio (“notorious; well-known”) * Portuguese notorjo (obsolete), notório (“illustrious; open, public; notorious”) * Spanish notorio (“apparent, clear, obvious; well-known”)

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

This entry
Origin ine-pro *ǵneh₃-
Level C1 · Advanced
Frequency Frequent
Updated