English Reference
noun

notion

n.
US /ˈnoʊʃən/ UK /nˈəʊʃən/ no·tion UK spelling notions

  1. 01 B2 Upper Intermediate Academic

    an idea, belief, or understanding of something.

    a mental representation or conceptual understanding of a particular topic or phenomenon.

    Simple

    Many people still hold the notion that success only comes from hard work.

    In context

    The traditional notion of a fixed career path has been challenged by the rise of the gig economy and remote work arrangements.

  2. 02 C1 Advanced Informal

    a sudden feeling or desire to do something, often without a clear reason.

    an impulsive inclination or whim to perform a specific action.

    Simple

    She had a sudden notion to go for a walk in the rain.

    In context

    He occasionally took the notion to quit his corporate job and move to the countryside, though he never actually followed through.

  3. 03 C1 Advanced American EnglishTechnical

    small items used for sewing, such as buttons, zippers, and thread.

    small functional items or accessories used in sewing and haberdashery.

    Simple

    You can find buttons and needles in the notions department of the store.

    In context

    The tailor kept a vast collection of notions, ranging from vintage brass buttons to high-quality silk threads, in neatly labelled drawers.

    sundrieshaberdashery
  4. 04 C2 Proficiency DialectBritish EnglishInformal

    the act of thinking you are better or more important than you really are.

    an attitude of pretentiousness or having ideas above one's social station.

    Simple

    Ever since he moved to the city, he's come back home with all sorts of notions.

    In context

    The locals were quick to criticise anyone who returned from abroad with notions, viewing any change in accent or habit as an affectation.

    Usage

    Almost always used in the plural form 'notions'.

    Teacher's tip

    This is specifically common in Irish English to describe someone who is acting 'fancy' or superior.

    pretensionairs

Usage general notion · introduce notion · notion of

Noel is not asked about his views in the film but he and Liam reject any notion that they stand for anything but unity between people.

The Guardian· 8 Sept 2026

I’m Canadian in America but it’s enthralling.” He rejects Miller’s notion that Star Trek’s inclusiveness has gone too far.

The Guardian· 8 Sept 2026

From Latin nōtiō (“a becoming acquainted, a taking cognizance, an examination, an investigation, a conception, idea, notion”), from nōscō (“to know”). Compare French notion. See know.

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

This entry
Origin Latin nōtiō
Level B2 · Upper Intermediate
Frequency Common
Updated