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  • ism
    ism
    noun
    a distinctive doctrine, theory, system, or practice.
  • -ism
    -ism
    a suffix appearing in loanwords from Greek, where it was used to form action nouns from verbs (baptism ); on this model, used as a productive suffix in the formation of nouns denoting action or practice, state or condition, principles, doctrines, a usage or characteristic, devotion or adherence, etc. (criticism; barbarism; Darwinism; despotism; plagiarism; realism; witticism; intellectualism ).
  • ISM
    ISM
    abbreviation
    interstellar medium
Synonyms

ism

1 American  
[iz-uhm] / ˈɪz əm /

noun

  1. a distinctive doctrine, theory, system, or practice.

    This is the age of isms.


-ism 2 American  
  1. a suffix appearing in loanwords from Greek, where it was used to form action nouns from verbs (baptism ); on this model, used as a productive suffix in the formation of nouns denoting action or practice, state or condition, principles, doctrines, a usage or characteristic, devotion or adherence, etc. (criticism; barbarism; Darwinism; despotism; plagiarism; realism; witticism; intellectualism ).


-ism 1 British  

suffix

  1. indicating an action, process, or result

    criticism

    terrorism

  2. indicating a state or condition

    paganism

  3. indicating a doctrine, system, or body of principles and practices

    Leninism

    spiritualism

  4. indicating behaviour or a characteristic quality

    heroism

  5. indicating a characteristic usage, esp of a language

    colloquialism

    Scotticism

  6. indicating prejudice on the basis specified

    sexism

    ageism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ISM 2 British  

abbreviation

  1. interstellar medium

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ism 3 British  
/ ˈɪzəm /

noun

  1. informal an unspecified doctrine, system, or practice

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ism1

Extracted from words with the suffix -ism

Origin of -ism2

From Greek -ismos, -isma noun suffixes, often directly, often through Latin -ismus, -isma, sometimes through French -isme, German -ismus (all ultimately from Greek )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Maybe national media outlets are cautious about deploying this ism, lest they be branded extreme, or lose audience.

From Los Angeles Times Mar. 8, 2023

“What you worry about ism this is two hours a day, right?”

From Seattle Times Jun. 8, 2020

Careerism is futile, yet somehow it is the only ism standing.

From The Guardian Apr. 23, 2020

But even though this is abstract photography decades before it became an ism in art, his work is seen as scientific.

From Slate Sep. 13, 2016

Long, unfamiliar words ending in tion, ism, and actic, with more talk about “the people” thrown in for good measure, like Big Ma throwing a pinch of salt into the cake batter.

From "One Crazy Summer" by Rita Williams-Garcia

We said, of course, yes, and brought the local publisher -ism into the mix to print the limited-edition zines that will be distributed at Halsey’s Frieze booth this week.

From Los Angeles Times Feb. 19, 2025

It doesn’t seem like one -ism or -ation is entirely to blame, like globalism or immigration, capitalism or inflation.

From Slate Oct. 12, 2024

This was, after all, the peak of "No Reservations" style "Yes, Chef" -ism, when cooking was supposed to be sexy and aggressive and a little bit dangerous.

From Salon Aug. 19, 2024

"We have one more -ism in our history: Stalinism," says Andrei Kolesnikov, senior fellow at the Carnegie Eurasia Russia Centre.

From BBC May 6, 2024

In the majority of cases the English suffix -ism and the Esperanto suffix -ism coincide, thus: komunismo = communism, vegetarismo = vegetarianism.

From The International Auxiliary Language Esperanto Grammar and Commentary by Cox, George

ISM Manufacturing PMI, a popular barometer of national manufacturing activity, held above 50 for a sixth straight month in June, according to the latest data.

From MarketWatch Jul. 15, 2026

“In June, 34 percent of the comments were positive and 66 percent negative, with a 1-to-1.9 ratio of positive to negative sentiment,” said Susan Spence, chair of the ISM Manufacturing Business Survey Committee.

From The Wall Street Journal Jul. 1, 2026

For example, the latest ISM manufacturing index accelerated to 54, the highest reading since 2022, while Friday’s jobs data showed a rolling three-month average gain of 166,000, the highest since 2023.

From MarketWatch Jun. 8, 2026

ADP private payrolls data and the ISM services report were stronger than expected, fuelling expectations the Federal Reserve could raise interest rates.

From The Wall Street Journal Jun. 4, 2026

The Termination ISM is always us'd but as one Syllable; as Where griesly Schism and raging Strife appear.Cowl.

From The Art of English Poetry (1708) by Bysshe, Edward

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